Commit | Line | Data |
---|---|---|
3e0a4e85 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * Copyright (c) 1996 John Shifflett, GeoLog Consulting | |
4 | * john@geolog.com | |
5 | * jshiffle@netcom.com | |
1da177e4 LT |
6 | */ |
7 | ||
8 | /* | |
9 | * Drew Eckhardt's excellent 'Generic NCR5380' sources from Linux-PC | |
10 | * provided much of the inspiration and some of the code for this | |
11 | * driver. Everything I know about Amiga DMA was gleaned from careful | |
12 | * reading of Hamish Mcdonald's original wd33c93 driver; in fact, I | |
13 | * borrowed shamelessly from all over that source. Thanks Hamish! | |
14 | * | |
15 | * _This_ driver is (I feel) an improvement over the old one in | |
16 | * several respects: | |
17 | * | |
18 | * - Target Disconnection/Reconnection is now supported. Any | |
19 | * system with more than one device active on the SCSI bus | |
20 | * will benefit from this. The driver defaults to what I | |
21 | * call 'adaptive disconnect' - meaning that each command | |
22 | * is evaluated individually as to whether or not it should | |
23 | * be run with the option to disconnect/reselect (if the | |
24 | * device chooses), or as a "SCSI-bus-hog". | |
25 | * | |
26 | * - Synchronous data transfers are now supported. Because of | |
27 | * a few devices that choke after telling the driver that | |
28 | * they can do sync transfers, we don't automatically use | |
29 | * this faster protocol - it can be enabled via the command- | |
30 | * line on a device-by-device basis. | |
31 | * | |
32 | * - Runtime operating parameters can now be specified through | |
33 | * the 'amiboot' or the 'insmod' command line. For amiboot do: | |
34 | * "amiboot [usual stuff] wd33c93=blah,blah,blah" | |
35 | * The defaults should be good for most people. See the comment | |
36 | * for 'setup_strings' below for more details. | |
37 | * | |
38 | * - The old driver relied exclusively on what the Western Digital | |
39 | * docs call "Combination Level 2 Commands", which are a great | |
40 | * idea in that the CPU is relieved of a lot of interrupt | |
41 | * overhead. However, by accepting a certain (user-settable) | |
42 | * amount of additional interrupts, this driver achieves | |
43 | * better control over the SCSI bus, and data transfers are | |
44 | * almost as fast while being much easier to define, track, | |
45 | * and debug. | |
46 | * | |
47 | * | |
48 | * TODO: | |
49 | * more speed. linked commands. | |
50 | * | |
51 | * | |
52 | * People with bug reports, wish-lists, complaints, comments, | |
53 | * or improvements are asked to pah-leeez email me (John Shifflett) | |
54 | * at john@geolog.com or jshiffle@netcom.com! I'm anxious to get | |
55 | * this thing into as good a shape as possible, and I'm positive | |
56 | * there are lots of lurking bugs and "Stupid Places". | |
57 | * | |
58 | * Updates: | |
59 | * | |
60 | * Added support for pre -A chips, which don't have advanced features | |
61 | * and will generate CSR_RESEL rather than CSR_RESEL_AM. | |
62 | * Richard Hirst <richard@sleepie.demon.co.uk> August 2000 | |
a5d8421b | 63 | * |
64 | * Added support for Burst Mode DMA and Fast SCSI. Enabled the use of | |
65 | * default_sx_per for asynchronous data transfers. Added adjustment | |
66 | * of transfer periods in sx_table to the actual input-clock. | |
67 | * peter fuerst <post@pfrst.de> February 2007 | |
1da177e4 LT |
68 | */ |
69 | ||
1da177e4 LT |
70 | #include <linux/module.h> |
71 | ||
1da177e4 LT |
72 | #include <linux/string.h> |
73 | #include <linux/delay.h> | |
1da177e4 | 74 | #include <linux/init.h> |
cf7f5b45 | 75 | #include <linux/interrupt.h> |
1da177e4 | 76 | #include <linux/blkdev.h> |
1da177e4 LT |
77 | |
78 | #include <scsi/scsi.h> | |
79 | #include <scsi/scsi_cmnd.h> | |
80 | #include <scsi/scsi_device.h> | |
81 | #include <scsi/scsi_host.h> | |
82 | ||
078dda95 AB |
83 | #include <asm/irq.h> |
84 | ||
1da177e4 LT |
85 | #include "wd33c93.h" |
86 | ||
a5d8421b | 87 | #define optimum_sx_per(hostdata) (hostdata)->sx_table[1].period_ns |
88 | ||
1da177e4 | 89 | |
a5d8421b | 90 | #define WD33C93_VERSION "1.26++" |
91 | #define WD33C93_DATE "10/Feb/2007" | |
1da177e4 LT |
92 | |
93 | MODULE_AUTHOR("John Shifflett"); | |
94 | MODULE_DESCRIPTION("Generic WD33C93 SCSI driver"); | |
95 | MODULE_LICENSE("GPL"); | |
96 | ||
97 | /* | |
98 | * 'setup_strings' is a single string used to pass operating parameters and | |
99 | * settings from the kernel/module command-line to the driver. 'setup_args[]' | |
100 | * is an array of strings that define the compile-time default values for | |
101 | * these settings. If Linux boots with an amiboot or insmod command-line, | |
102 | * those settings are combined with 'setup_args[]'. Note that amiboot | |
103 | * command-lines are prefixed with "wd33c93=" while insmod uses a | |
104 | * "setup_strings=" prefix. The driver recognizes the following keywords | |
105 | * (lower case required) and arguments: | |
106 | * | |
107 | * - nosync:bitmask -bitmask is a byte where the 1st 7 bits correspond with | |
108 | * the 7 possible SCSI devices. Set a bit to negotiate for | |
109 | * asynchronous transfers on that device. To maintain | |
110 | * backwards compatibility, a command-line such as | |
111 | * "wd33c93=255" will be automatically translated to | |
112 | * "wd33c93=nosync:0xff". | |
113 | * - nodma:x -x = 1 to disable DMA, x = 0 to enable it. Argument is | |
114 | * optional - if not present, same as "nodma:1". | |
115 | * - period:ns -ns is the minimum # of nanoseconds in a SCSI data transfer | |
116 | * period. Default is 500; acceptable values are 250 - 1000. | |
117 | * - disconnect:x -x = 0 to never allow disconnects, 2 to always allow them. | |
118 | * x = 1 does 'adaptive' disconnects, which is the default | |
119 | * and generally the best choice. | |
120 | * - debug:x -If 'DEBUGGING_ON' is defined, x is a bit mask that causes | |
121 | * various types of debug output to printed - see the DB_xxx | |
122 | * defines in wd33c93.h | |
123 | * - clock:x -x = clock input in MHz for WD33c93 chip. Normal values | |
124 | * would be from 8 through 20. Default is 8. | |
a5d8421b | 125 | * - burst:x -x = 1 to use Burst Mode (or Demand-Mode) DMA, x = 0 to use |
126 | * Single Byte DMA, which is the default. Argument is | |
127 | * optional - if not present, same as "burst:1". | |
128 | * - fast:x -x = 1 to enable Fast SCSI, which is only effective with | |
129 | * input-clock divisor 4 (WD33C93_FS_16_20), x = 0 to disable | |
130 | * it, which is the default. Argument is optional - if not | |
131 | * present, same as "fast:1". | |
1da177e4 LT |
132 | * - next -No argument. Used to separate blocks of keywords when |
133 | * there's more than one host adapter in the system. | |
134 | * | |
135 | * Syntax Notes: | |
136 | * - Numeric arguments can be decimal or the '0x' form of hex notation. There | |
137 | * _must_ be a colon between a keyword and its numeric argument, with no | |
138 | * spaces. | |
139 | * - Keywords are separated by commas, no spaces, in the standard kernel | |
140 | * command-line manner. | |
141 | * - A keyword in the 'nth' comma-separated command-line member will overwrite | |
142 | * the 'nth' element of setup_args[]. A blank command-line member (in | |
143 | * other words, a comma with no preceding keyword) will _not_ overwrite | |
144 | * the corresponding setup_args[] element. | |
145 | * - If a keyword is used more than once, the first one applies to the first | |
146 | * SCSI host found, the second to the second card, etc, unless the 'next' | |
147 | * keyword is used to change the order. | |
148 | * | |
149 | * Some amiboot examples (for insmod, use 'setup_strings' instead of 'wd33c93'): | |
150 | * - wd33c93=nosync:255 | |
151 | * - wd33c93=nodma | |
152 | * - wd33c93=nodma:1 | |
153 | * - wd33c93=disconnect:2,nosync:0x08,period:250 | |
154 | * - wd33c93=debug:0x1c | |
155 | */ | |
156 | ||
157 | /* Normally, no defaults are specified */ | |
a5d8421b | 158 | static char *setup_args[] = { "", "", "", "", "", "", "", "", "", "" }; |
1da177e4 LT |
159 | |
160 | static char *setup_strings; | |
161 | module_param(setup_strings, charp, 0); | |
162 | ||
163 | static void wd33c93_execute(struct Scsi_Host *instance); | |
164 | ||
165 | #ifdef CONFIG_WD33C93_PIO | |
166 | static inline uchar | |
167 | read_wd33c93(const wd33c93_regs regs, uchar reg_num) | |
168 | { | |
169 | uchar data; | |
170 | ||
171 | outb(reg_num, regs.SASR); | |
172 | data = inb(regs.SCMD); | |
173 | return data; | |
174 | } | |
175 | ||
176 | static inline unsigned long | |
177 | read_wd33c93_count(const wd33c93_regs regs) | |
178 | { | |
179 | unsigned long value; | |
180 | ||
181 | outb(WD_TRANSFER_COUNT_MSB, regs.SASR); | |
182 | value = inb(regs.SCMD) << 16; | |
183 | value |= inb(regs.SCMD) << 8; | |
184 | value |= inb(regs.SCMD); | |
185 | return value; | |
186 | } | |
187 | ||
188 | static inline uchar | |
189 | read_aux_stat(const wd33c93_regs regs) | |
190 | { | |
191 | return inb(regs.SASR); | |
192 | } | |
193 | ||
194 | static inline void | |
195 | write_wd33c93(const wd33c93_regs regs, uchar reg_num, uchar value) | |
196 | { | |
197 | outb(reg_num, regs.SASR); | |
198 | outb(value, regs.SCMD); | |
199 | } | |
200 | ||
201 | static inline void | |
202 | write_wd33c93_count(const wd33c93_regs regs, unsigned long value) | |
203 | { | |
204 | outb(WD_TRANSFER_COUNT_MSB, regs.SASR); | |
205 | outb((value >> 16) & 0xff, regs.SCMD); | |
206 | outb((value >> 8) & 0xff, regs.SCMD); | |
207 | outb( value & 0xff, regs.SCMD); | |
208 | } | |
209 | ||
210 | #define write_wd33c93_cmd(regs, cmd) \ | |
211 | write_wd33c93((regs), WD_COMMAND, (cmd)) | |
212 | ||
213 | static inline void | |
214 | write_wd33c93_cdb(const wd33c93_regs regs, uint len, uchar cmnd[]) | |
215 | { | |
216 | int i; | |
217 | ||
218 | outb(WD_CDB_1, regs.SASR); | |
219 | for (i=0; i<len; i++) | |
220 | outb(cmnd[i], regs.SCMD); | |
221 | } | |
222 | ||
223 | #else /* CONFIG_WD33C93_PIO */ | |
224 | static inline uchar | |
225 | read_wd33c93(const wd33c93_regs regs, uchar reg_num) | |
226 | { | |
227 | *regs.SASR = reg_num; | |
228 | mb(); | |
229 | return (*regs.SCMD); | |
230 | } | |
231 | ||
232 | static unsigned long | |
233 | read_wd33c93_count(const wd33c93_regs regs) | |
234 | { | |
235 | unsigned long value; | |
236 | ||
237 | *regs.SASR = WD_TRANSFER_COUNT_MSB; | |
238 | mb(); | |
239 | value = *regs.SCMD << 16; | |
240 | value |= *regs.SCMD << 8; | |
241 | value |= *regs.SCMD; | |
242 | mb(); | |
243 | return value; | |
244 | } | |
245 | ||
246 | static inline uchar | |
247 | read_aux_stat(const wd33c93_regs regs) | |
248 | { | |
249 | return *regs.SASR; | |
250 | } | |
251 | ||
252 | static inline void | |
253 | write_wd33c93(const wd33c93_regs regs, uchar reg_num, uchar value) | |
254 | { | |
255 | *regs.SASR = reg_num; | |
256 | mb(); | |
257 | *regs.SCMD = value; | |
258 | mb(); | |
259 | } | |
260 | ||
261 | static void | |
262 | write_wd33c93_count(const wd33c93_regs regs, unsigned long value) | |
263 | { | |
264 | *regs.SASR = WD_TRANSFER_COUNT_MSB; | |
265 | mb(); | |
266 | *regs.SCMD = value >> 16; | |
267 | *regs.SCMD = value >> 8; | |
268 | *regs.SCMD = value; | |
269 | mb(); | |
270 | } | |
271 | ||
272 | static inline void | |
273 | write_wd33c93_cmd(const wd33c93_regs regs, uchar cmd) | |
274 | { | |
275 | *regs.SASR = WD_COMMAND; | |
276 | mb(); | |
277 | *regs.SCMD = cmd; | |
278 | mb(); | |
279 | } | |
280 | ||
281 | static inline void | |
282 | write_wd33c93_cdb(const wd33c93_regs regs, uint len, uchar cmnd[]) | |
283 | { | |
284 | int i; | |
285 | ||
286 | *regs.SASR = WD_CDB_1; | |
287 | for (i = 0; i < len; i++) | |
288 | *regs.SCMD = cmnd[i]; | |
289 | } | |
290 | #endif /* CONFIG_WD33C93_PIO */ | |
291 | ||
292 | static inline uchar | |
293 | read_1_byte(const wd33c93_regs regs) | |
294 | { | |
295 | uchar asr; | |
296 | uchar x = 0; | |
297 | ||
298 | write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); | |
299 | write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO | 0x80); | |
300 | do { | |
301 | asr = read_aux_stat(regs); | |
302 | if (asr & ASR_DBR) | |
303 | x = read_wd33c93(regs, WD_DATA); | |
304 | } while (!(asr & ASR_INT)); | |
305 | return x; | |
306 | } | |
307 | ||
1da177e4 | 308 | static int |
a5d8421b | 309 | round_period(unsigned int period, const struct sx_period *sx_table) |
1da177e4 LT |
310 | { |
311 | int x; | |
312 | ||
313 | for (x = 1; sx_table[x].period_ns; x++) { | |
314 | if ((period <= sx_table[x - 0].period_ns) && | |
315 | (period > sx_table[x - 1].period_ns)) { | |
316 | return x; | |
317 | } | |
318 | } | |
319 | return 7; | |
320 | } | |
321 | ||
a5d8421b | 322 | /* |
323 | * Calculate Synchronous Transfer Register value from SDTR code. | |
324 | */ | |
1da177e4 | 325 | static uchar |
a5d8421b | 326 | calc_sync_xfer(unsigned int period, unsigned int offset, unsigned int fast, |
327 | const struct sx_period *sx_table) | |
1da177e4 | 328 | { |
a5d8421b | 329 | /* When doing Fast SCSI synchronous data transfers, the corresponding |
330 | * value in 'sx_table' is two times the actually used transfer period. | |
331 | */ | |
1da177e4 LT |
332 | uchar result; |
333 | ||
a5d8421b | 334 | if (offset && fast) { |
335 | fast = STR_FSS; | |
336 | period *= 2; | |
337 | } else { | |
338 | fast = 0; | |
339 | } | |
1da177e4 | 340 | period *= 4; /* convert SDTR code to ns */ |
a5d8421b | 341 | result = sx_table[round_period(period,sx_table)].reg_value; |
1da177e4 | 342 | result |= (offset < OPTIMUM_SX_OFF) ? offset : OPTIMUM_SX_OFF; |
a5d8421b | 343 | result |= fast; |
1da177e4 LT |
344 | return result; |
345 | } | |
346 | ||
a5d8421b | 347 | /* |
348 | * Calculate SDTR code bytes [3],[4] from period and offset. | |
349 | */ | |
350 | static inline void | |
351 | calc_sync_msg(unsigned int period, unsigned int offset, unsigned int fast, | |
352 | uchar msg[2]) | |
353 | { | |
354 | /* 'period' is a "normal"-mode value, like the ones in 'sx_table'. The | |
355 | * actually used transfer period for Fast SCSI synchronous data | |
356 | * transfers is half that value. | |
357 | */ | |
358 | period /= 4; | |
359 | if (offset && fast) | |
360 | period /= 2; | |
361 | msg[0] = period; | |
362 | msg[1] = offset; | |
363 | } | |
364 | ||
af049dfd | 365 | static int wd33c93_queuecommand_lck(struct scsi_cmnd *cmd) |
1da177e4 LT |
366 | { |
367 | struct WD33C93_hostdata *hostdata; | |
368 | struct scsi_cmnd *tmp; | |
369 | ||
370 | hostdata = (struct WD33C93_hostdata *) cmd->device->host->hostdata; | |
371 | ||
372 | DB(DB_QUEUE_COMMAND, | |
5cd049a5 | 373 | printk("Q-%d-%02x( ", cmd->device->id, cmd->cmnd[0])) |
1da177e4 LT |
374 | |
375 | /* Set up a few fields in the scsi_cmnd structure for our own use: | |
376 | * - host_scribble is the pointer to the next cmd in the input queue | |
1da177e4 LT |
377 | * - result is what you'd expect |
378 | */ | |
379 | cmd->host_scribble = NULL; | |
1da177e4 LT |
380 | cmd->result = 0; |
381 | ||
382 | /* We use the Scsi_Pointer structure that's included with each command | |
383 | * as a scratchpad (as it's intended to be used!). The handy thing about | |
384 | * the SCp.xxx fields is that they're always associated with a given | |
385 | * cmd, and are preserved across disconnect-reselect. This means we | |
386 | * can pretty much ignore SAVE_POINTERS and RESTORE_POINTERS messages | |
387 | * if we keep all the critical pointers and counters in SCp: | |
388 | * - SCp.ptr is the pointer into the RAM buffer | |
389 | * - SCp.this_residual is the size of that buffer | |
390 | * - SCp.buffer points to the current scatter-gather buffer | |
391 | * - SCp.buffers_residual tells us how many S.G. buffers there are | |
392 | * - SCp.have_data_in is not used | |
393 | * - SCp.sent_command is not used | |
394 | * - SCp.phase records this command's SRCID_ER bit setting | |
395 | */ | |
396 | ||
ee0ae927 BH |
397 | if (scsi_bufflen(cmd)) { |
398 | cmd->SCp.buffer = scsi_sglist(cmd); | |
399 | cmd->SCp.buffers_residual = scsi_sg_count(cmd) - 1; | |
45711f1a | 400 | cmd->SCp.ptr = sg_virt(cmd->SCp.buffer); |
1da177e4 LT |
401 | cmd->SCp.this_residual = cmd->SCp.buffer->length; |
402 | } else { | |
403 | cmd->SCp.buffer = NULL; | |
404 | cmd->SCp.buffers_residual = 0; | |
ee0ae927 BH |
405 | cmd->SCp.ptr = NULL; |
406 | cmd->SCp.this_residual = 0; | |
1da177e4 LT |
407 | } |
408 | ||
409 | /* WD docs state that at the conclusion of a "LEVEL2" command, the | |
410 | * status byte can be retrieved from the LUN register. Apparently, | |
411 | * this is the case only for *uninterrupted* LEVEL2 commands! If | |
412 | * there are any unexpected phases entered, even if they are 100% | |
413 | * legal (different devices may choose to do things differently), | |
414 | * the LEVEL2 command sequence is exited. This often occurs prior | |
415 | * to receiving the status byte, in which case the driver does a | |
416 | * status phase interrupt and gets the status byte on its own. | |
417 | * While such a command can then be "resumed" (ie restarted to | |
418 | * finish up as a LEVEL2 command), the LUN register will NOT be | |
419 | * a valid status byte at the command's conclusion, and we must | |
420 | * use the byte obtained during the earlier interrupt. Here, we | |
421 | * preset SCp.Status to an illegal value (0xff) so that when | |
422 | * this command finally completes, we can tell where the actual | |
423 | * status byte is stored. | |
424 | */ | |
425 | ||
426 | cmd->SCp.Status = ILLEGAL_STATUS_BYTE; | |
427 | ||
428 | /* | |
429 | * Add the cmd to the end of 'input_Q'. Note that REQUEST SENSE | |
430 | * commands are added to the head of the queue so that the desired | |
431 | * sense data is not lost before REQUEST_SENSE executes. | |
432 | */ | |
433 | ||
434 | spin_lock_irq(&hostdata->lock); | |
435 | ||
436 | if (!(hostdata->input_Q) || (cmd->cmnd[0] == REQUEST_SENSE)) { | |
437 | cmd->host_scribble = (uchar *) hostdata->input_Q; | |
438 | hostdata->input_Q = cmd; | |
439 | } else { /* find the end of the queue */ | |
440 | for (tmp = (struct scsi_cmnd *) hostdata->input_Q; | |
441 | tmp->host_scribble; | |
442 | tmp = (struct scsi_cmnd *) tmp->host_scribble) ; | |
443 | tmp->host_scribble = (uchar *) cmd; | |
444 | } | |
445 | ||
446 | /* We know that there's at least one command in 'input_Q' now. | |
447 | * Go see if any of them are runnable! | |
448 | */ | |
449 | ||
450 | wd33c93_execute(cmd->device->host); | |
451 | ||
5cd049a5 | 452 | DB(DB_QUEUE_COMMAND, printk(")Q ")) |
1da177e4 LT |
453 | |
454 | spin_unlock_irq(&hostdata->lock); | |
455 | return 0; | |
456 | } | |
457 | ||
f281233d JG |
458 | DEF_SCSI_QCMD(wd33c93_queuecommand) |
459 | ||
1da177e4 LT |
460 | /* |
461 | * This routine attempts to start a scsi command. If the host_card is | |
462 | * already connected, we give up immediately. Otherwise, look through | |
463 | * the input_Q, using the first command we find that's intended | |
464 | * for a currently non-busy target/lun. | |
465 | * | |
466 | * wd33c93_execute() is always called with interrupts disabled or from | |
467 | * the wd33c93_intr itself, which means that a wd33c93 interrupt | |
468 | * cannot occur while we are in here. | |
469 | */ | |
470 | static void | |
471 | wd33c93_execute(struct Scsi_Host *instance) | |
472 | { | |
473 | struct WD33C93_hostdata *hostdata = | |
474 | (struct WD33C93_hostdata *) instance->hostdata; | |
475 | const wd33c93_regs regs = hostdata->regs; | |
476 | struct scsi_cmnd *cmd, *prev; | |
477 | ||
478 | DB(DB_EXECUTE, printk("EX(")) | |
479 | if (hostdata->selecting || hostdata->connected) { | |
480 | DB(DB_EXECUTE, printk(")EX-0 ")) | |
481 | return; | |
482 | } | |
483 | ||
484 | /* | |
485 | * Search through the input_Q for a command destined | |
486 | * for an idle target/lun. | |
487 | */ | |
488 | ||
489 | cmd = (struct scsi_cmnd *) hostdata->input_Q; | |
a5d361fc | 490 | prev = NULL; |
1da177e4 | 491 | while (cmd) { |
9cb78c16 HR |
492 | if (!(hostdata->busy[cmd->device->id] & |
493 | (1 << (cmd->device->lun & 0xff)))) | |
1da177e4 LT |
494 | break; |
495 | prev = cmd; | |
496 | cmd = (struct scsi_cmnd *) cmd->host_scribble; | |
497 | } | |
498 | ||
499 | /* quit if queue empty or all possible targets are busy */ | |
500 | ||
501 | if (!cmd) { | |
502 | DB(DB_EXECUTE, printk(")EX-1 ")) | |
503 | return; | |
504 | } | |
505 | ||
506 | /* remove command from queue */ | |
507 | ||
508 | if (prev) | |
509 | prev->host_scribble = cmd->host_scribble; | |
510 | else | |
511 | hostdata->input_Q = (struct scsi_cmnd *) cmd->host_scribble; | |
512 | ||
513 | #ifdef PROC_STATISTICS | |
514 | hostdata->cmd_cnt[cmd->device->id]++; | |
515 | #endif | |
516 | ||
517 | /* | |
518 | * Start the selection process | |
519 | */ | |
520 | ||
521 | if (cmd->sc_data_direction == DMA_TO_DEVICE) | |
522 | write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id); | |
523 | else | |
524 | write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id | DSTID_DPD); | |
525 | ||
526 | /* Now we need to figure out whether or not this command is a good | |
527 | * candidate for disconnect/reselect. We guess to the best of our | |
528 | * ability, based on a set of hierarchical rules. When several | |
529 | * devices are operating simultaneously, disconnects are usually | |
530 | * an advantage. In a single device system, or if only 1 device | |
531 | * is being accessed, transfers usually go faster if disconnects | |
532 | * are not allowed: | |
533 | * | |
534 | * + Commands should NEVER disconnect if hostdata->disconnect = | |
535 | * DIS_NEVER (this holds for tape drives also), and ALWAYS | |
536 | * disconnect if hostdata->disconnect = DIS_ALWAYS. | |
537 | * + Tape drive commands should always be allowed to disconnect. | |
538 | * + Disconnect should be allowed if disconnected_Q isn't empty. | |
539 | * + Commands should NOT disconnect if input_Q is empty. | |
540 | * + Disconnect should be allowed if there are commands in input_Q | |
541 | * for a different target/lun. In this case, the other commands | |
542 | * should be made disconnect-able, if not already. | |
543 | * | |
544 | * I know, I know - this code would flunk me out of any | |
545 | * "C Programming 101" class ever offered. But it's easy | |
546 | * to change around and experiment with for now. | |
547 | */ | |
548 | ||
549 | cmd->SCp.phase = 0; /* assume no disconnect */ | |
550 | if (hostdata->disconnect == DIS_NEVER) | |
551 | goto no; | |
552 | if (hostdata->disconnect == DIS_ALWAYS) | |
553 | goto yes; | |
554 | if (cmd->device->type == 1) /* tape drive? */ | |
555 | goto yes; | |
556 | if (hostdata->disconnected_Q) /* other commands disconnected? */ | |
557 | goto yes; | |
558 | if (!(hostdata->input_Q)) /* input_Q empty? */ | |
559 | goto no; | |
560 | for (prev = (struct scsi_cmnd *) hostdata->input_Q; prev; | |
561 | prev = (struct scsi_cmnd *) prev->host_scribble) { | |
562 | if ((prev->device->id != cmd->device->id) || | |
563 | (prev->device->lun != cmd->device->lun)) { | |
564 | for (prev = (struct scsi_cmnd *) hostdata->input_Q; prev; | |
565 | prev = (struct scsi_cmnd *) prev->host_scribble) | |
566 | prev->SCp.phase = 1; | |
567 | goto yes; | |
568 | } | |
569 | } | |
570 | ||
571 | goto no; | |
572 | ||
573 | yes: | |
574 | cmd->SCp.phase = 1; | |
575 | ||
576 | #ifdef PROC_STATISTICS | |
577 | hostdata->disc_allowed_cnt[cmd->device->id]++; | |
578 | #endif | |
579 | ||
580 | no: | |
581 | ||
582 | write_wd33c93(regs, WD_SOURCE_ID, ((cmd->SCp.phase) ? SRCID_ER : 0)); | |
583 | ||
9cb78c16 | 584 | write_wd33c93(regs, WD_TARGET_LUN, (u8)cmd->device->lun); |
1da177e4 LT |
585 | write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, |
586 | hostdata->sync_xfer[cmd->device->id]); | |
9cb78c16 | 587 | hostdata->busy[cmd->device->id] |= (1 << (cmd->device->lun & 0xFF)); |
1da177e4 LT |
588 | |
589 | if ((hostdata->level2 == L2_NONE) || | |
590 | (hostdata->sync_stat[cmd->device->id] == SS_UNSET)) { | |
591 | ||
592 | /* | |
593 | * Do a 'Select-With-ATN' command. This will end with | |
594 | * one of the following interrupts: | |
595 | * CSR_RESEL_AM: failure - can try again later. | |
596 | * CSR_TIMEOUT: failure - give up. | |
597 | * CSR_SELECT: success - proceed. | |
598 | */ | |
599 | ||
600 | hostdata->selecting = cmd; | |
601 | ||
602 | /* Every target has its own synchronous transfer setting, kept in the | |
603 | * sync_xfer array, and a corresponding status byte in sync_stat[]. | |
604 | * Each target's sync_stat[] entry is initialized to SX_UNSET, and its | |
605 | * sync_xfer[] entry is initialized to the default/safe value. SS_UNSET | |
606 | * means that the parameters are undetermined as yet, and that we | |
607 | * need to send an SDTR message to this device after selection is | |
608 | * complete: We set SS_FIRST to tell the interrupt routine to do so. | |
609 | * If we've been asked not to try synchronous transfers on this | |
610 | * target (and _all_ luns within it), we'll still send the SDTR message | |
611 | * later, but at that time we'll negotiate for async by specifying a | |
612 | * sync fifo depth of 0. | |
613 | */ | |
614 | if (hostdata->sync_stat[cmd->device->id] == SS_UNSET) | |
615 | hostdata->sync_stat[cmd->device->id] = SS_FIRST; | |
616 | hostdata->state = S_SELECTING; | |
617 | write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ | |
618 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN); | |
619 | } else { | |
620 | ||
621 | /* | |
622 | * Do a 'Select-With-ATN-Xfer' command. This will end with | |
623 | * one of the following interrupts: | |
624 | * CSR_RESEL_AM: failure - can try again later. | |
625 | * CSR_TIMEOUT: failure - give up. | |
626 | * anything else: success - proceed. | |
627 | */ | |
628 | ||
629 | hostdata->connected = cmd; | |
630 | write_wd33c93(regs, WD_COMMAND_PHASE, 0); | |
631 | ||
632 | /* copy command_descriptor_block into WD chip | |
633 | * (take advantage of auto-incrementing) | |
634 | */ | |
635 | ||
636 | write_wd33c93_cdb(regs, cmd->cmd_len, cmd->cmnd); | |
637 | ||
638 | /* The wd33c93 only knows about Group 0, 1, and 5 commands when | |
639 | * it's doing a 'select-and-transfer'. To be safe, we write the | |
640 | * size of the CDB into the OWN_ID register for every case. This | |
641 | * way there won't be problems with vendor-unique, audio, etc. | |
642 | */ | |
643 | ||
644 | write_wd33c93(regs, WD_OWN_ID, cmd->cmd_len); | |
645 | ||
646 | /* When doing a non-disconnect command with DMA, we can save | |
647 | * ourselves a DATA phase interrupt later by setting everything | |
648 | * up ahead of time. | |
649 | */ | |
650 | ||
651 | if ((cmd->SCp.phase == 0) && (hostdata->no_dma == 0)) { | |
652 | if (hostdata->dma_setup(cmd, | |
653 | (cmd->sc_data_direction == DMA_TO_DEVICE) ? | |
654 | DATA_OUT_DIR : DATA_IN_DIR)) | |
655 | write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ | |
656 | else { | |
657 | write_wd33c93_count(regs, | |
658 | cmd->SCp.this_residual); | |
659 | write_wd33c93(regs, WD_CONTROL, | |
a5d8421b | 660 | CTRL_IDI | CTRL_EDI | hostdata->dma_mode); |
1da177e4 LT |
661 | hostdata->dma = D_DMA_RUNNING; |
662 | } | |
663 | } else | |
664 | write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */ | |
665 | ||
666 | hostdata->state = S_RUNNING_LEVEL2; | |
667 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); | |
668 | } | |
669 | ||
670 | /* | |
671 | * Since the SCSI bus can handle only 1 connection at a time, | |
672 | * we get out of here now. If the selection fails, or when | |
673 | * the command disconnects, we'll come back to this routine | |
674 | * to search the input_Q again... | |
675 | */ | |
676 | ||
677 | DB(DB_EXECUTE, | |
5cd049a5 | 678 | printk("%s)EX-2 ", (cmd->SCp.phase) ? "d:" : "")) |
1da177e4 LT |
679 | } |
680 | ||
681 | static void | |
682 | transfer_pio(const wd33c93_regs regs, uchar * buf, int cnt, | |
683 | int data_in_dir, struct WD33C93_hostdata *hostdata) | |
684 | { | |
685 | uchar asr; | |
686 | ||
687 | DB(DB_TRANSFER, | |
688 | printk("(%p,%d,%s:", buf, cnt, data_in_dir ? "in" : "out")) | |
689 | ||
690 | write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); | |
691 | write_wd33c93_count(regs, cnt); | |
692 | write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO); | |
693 | if (data_in_dir) { | |
694 | do { | |
695 | asr = read_aux_stat(regs); | |
696 | if (asr & ASR_DBR) | |
697 | *buf++ = read_wd33c93(regs, WD_DATA); | |
698 | } while (!(asr & ASR_INT)); | |
699 | } else { | |
700 | do { | |
701 | asr = read_aux_stat(regs); | |
702 | if (asr & ASR_DBR) | |
703 | write_wd33c93(regs, WD_DATA, *buf++); | |
704 | } while (!(asr & ASR_INT)); | |
705 | } | |
706 | ||
707 | /* Note: we are returning with the interrupt UN-cleared. | |
708 | * Since (presumably) an entire I/O operation has | |
709 | * completed, the bus phase is probably different, and | |
710 | * the interrupt routine will discover this when it | |
711 | * responds to the uncleared int. | |
712 | */ | |
713 | ||
714 | } | |
715 | ||
716 | static void | |
717 | transfer_bytes(const wd33c93_regs regs, struct scsi_cmnd *cmd, | |
718 | int data_in_dir) | |
719 | { | |
720 | struct WD33C93_hostdata *hostdata; | |
721 | unsigned long length; | |
722 | ||
723 | hostdata = (struct WD33C93_hostdata *) cmd->device->host->hostdata; | |
724 | ||
725 | /* Normally, you'd expect 'this_residual' to be non-zero here. | |
726 | * In a series of scatter-gather transfers, however, this | |
727 | * routine will usually be called with 'this_residual' equal | |
728 | * to 0 and 'buffers_residual' non-zero. This means that a | |
729 | * previous transfer completed, clearing 'this_residual', and | |
730 | * now we need to setup the next scatter-gather buffer as the | |
731 | * source or destination for THIS transfer. | |
732 | */ | |
733 | if (!cmd->SCp.this_residual && cmd->SCp.buffers_residual) { | |
c3c0fd9b | 734 | cmd->SCp.buffer = sg_next(cmd->SCp.buffer); |
1da177e4 LT |
735 | --cmd->SCp.buffers_residual; |
736 | cmd->SCp.this_residual = cmd->SCp.buffer->length; | |
45711f1a | 737 | cmd->SCp.ptr = sg_virt(cmd->SCp.buffer); |
1da177e4 | 738 | } |
a5d8421b | 739 | if (!cmd->SCp.this_residual) /* avoid bogus setups */ |
740 | return; | |
1da177e4 LT |
741 | |
742 | write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, | |
743 | hostdata->sync_xfer[cmd->device->id]); | |
744 | ||
745 | /* 'hostdata->no_dma' is TRUE if we don't even want to try DMA. | |
746 | * Update 'this_residual' and 'ptr' after 'transfer_pio()' returns. | |
747 | */ | |
748 | ||
749 | if (hostdata->no_dma || hostdata->dma_setup(cmd, data_in_dir)) { | |
750 | #ifdef PROC_STATISTICS | |
751 | hostdata->pio_cnt++; | |
752 | #endif | |
753 | transfer_pio(regs, (uchar *) cmd->SCp.ptr, | |
754 | cmd->SCp.this_residual, data_in_dir, hostdata); | |
755 | length = cmd->SCp.this_residual; | |
756 | cmd->SCp.this_residual = read_wd33c93_count(regs); | |
757 | cmd->SCp.ptr += (length - cmd->SCp.this_residual); | |
758 | } | |
759 | ||
760 | /* We are able to do DMA (in fact, the Amiga hardware is | |
761 | * already going!), so start up the wd33c93 in DMA mode. | |
762 | * We set 'hostdata->dma' = D_DMA_RUNNING so that when the | |
763 | * transfer completes and causes an interrupt, we're | |
764 | * reminded to tell the Amiga to shut down its end. We'll | |
765 | * postpone the updating of 'this_residual' and 'ptr' | |
766 | * until then. | |
767 | */ | |
768 | ||
769 | else { | |
770 | #ifdef PROC_STATISTICS | |
771 | hostdata->dma_cnt++; | |
772 | #endif | |
a5d8421b | 773 | write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | hostdata->dma_mode); |
1da177e4 LT |
774 | write_wd33c93_count(regs, cmd->SCp.this_residual); |
775 | ||
776 | if ((hostdata->level2 >= L2_DATA) || | |
777 | (hostdata->level2 == L2_BASIC && cmd->SCp.phase == 0)) { | |
778 | write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); | |
779 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); | |
780 | hostdata->state = S_RUNNING_LEVEL2; | |
781 | } else | |
782 | write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO); | |
783 | ||
784 | hostdata->dma = D_DMA_RUNNING; | |
785 | } | |
786 | } | |
787 | ||
788 | void | |
789 | wd33c93_intr(struct Scsi_Host *instance) | |
790 | { | |
791 | struct WD33C93_hostdata *hostdata = | |
792 | (struct WD33C93_hostdata *) instance->hostdata; | |
793 | const wd33c93_regs regs = hostdata->regs; | |
794 | struct scsi_cmnd *patch, *cmd; | |
795 | uchar asr, sr, phs, id, lun, *ucp, msg; | |
796 | unsigned long length, flags; | |
797 | ||
798 | asr = read_aux_stat(regs); | |
799 | if (!(asr & ASR_INT) || (asr & ASR_BSY)) | |
800 | return; | |
801 | ||
802 | spin_lock_irqsave(&hostdata->lock, flags); | |
803 | ||
804 | #ifdef PROC_STATISTICS | |
805 | hostdata->int_cnt++; | |
806 | #endif | |
807 | ||
808 | cmd = (struct scsi_cmnd *) hostdata->connected; /* assume we're connected */ | |
809 | sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear the interrupt */ | |
810 | phs = read_wd33c93(regs, WD_COMMAND_PHASE); | |
811 | ||
812 | DB(DB_INTR, printk("{%02x:%02x-", asr, sr)) | |
813 | ||
814 | /* After starting a DMA transfer, the next interrupt | |
815 | * is guaranteed to be in response to completion of | |
816 | * the transfer. Since the Amiga DMA hardware runs in | |
817 | * in an open-ended fashion, it needs to be told when | |
818 | * to stop; do that here if D_DMA_RUNNING is true. | |
819 | * Also, we have to update 'this_residual' and 'ptr' | |
820 | * based on the contents of the TRANSFER_COUNT register, | |
821 | * in case the device decided to do an intermediate | |
822 | * disconnect (a device may do this if it has to do a | |
823 | * seek, or just to be nice and let other devices have | |
824 | * some bus time during long transfers). After doing | |
825 | * whatever is needed, we go on and service the WD3393 | |
826 | * interrupt normally. | |
827 | */ | |
828 | if (hostdata->dma == D_DMA_RUNNING) { | |
829 | DB(DB_TRANSFER, | |
830 | printk("[%p/%d:", cmd->SCp.ptr, cmd->SCp.this_residual)) | |
831 | hostdata->dma_stop(cmd->device->host, cmd, 1); | |
832 | hostdata->dma = D_DMA_OFF; | |
833 | length = cmd->SCp.this_residual; | |
834 | cmd->SCp.this_residual = read_wd33c93_count(regs); | |
835 | cmd->SCp.ptr += (length - cmd->SCp.this_residual); | |
836 | DB(DB_TRANSFER, | |
837 | printk("%p/%d]", cmd->SCp.ptr, cmd->SCp.this_residual)) | |
838 | } | |
839 | ||
840 | /* Respond to the specific WD3393 interrupt - there are quite a few! */ | |
841 | switch (sr) { | |
842 | case CSR_TIMEOUT: | |
843 | DB(DB_INTR, printk("TIMEOUT")) | |
844 | ||
845 | if (hostdata->state == S_RUNNING_LEVEL2) | |
846 | hostdata->connected = NULL; | |
847 | else { | |
848 | cmd = (struct scsi_cmnd *) hostdata->selecting; /* get a valid cmd */ | |
849 | hostdata->selecting = NULL; | |
850 | } | |
851 | ||
852 | cmd->result = DID_NO_CONNECT << 16; | |
9cb78c16 | 853 | hostdata->busy[cmd->device->id] &= ~(1 << (cmd->device->lun & 0xff)); |
1da177e4 | 854 | hostdata->state = S_UNCONNECTED; |
9c4f6be7 | 855 | scsi_done(cmd); |
1da177e4 LT |
856 | |
857 | /* From esp.c: | |
858 | * There is a window of time within the scsi_done() path | |
859 | * of execution where interrupts are turned back on full | |
860 | * blast and left that way. During that time we could | |
861 | * reconnect to a disconnected command, then we'd bomb | |
862 | * out below. We could also end up executing two commands | |
863 | * at _once_. ...just so you know why the restore_flags() | |
864 | * is here... | |
865 | */ | |
866 | ||
867 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
868 | ||
869 | /* We are not connected to a target - check to see if there | |
870 | * are commands waiting to be executed. | |
871 | */ | |
872 | ||
873 | wd33c93_execute(instance); | |
874 | break; | |
875 | ||
876 | /* Note: this interrupt should not occur in a LEVEL2 command */ | |
877 | ||
878 | case CSR_SELECT: | |
879 | DB(DB_INTR, printk("SELECT")) | |
880 | hostdata->connected = cmd = | |
881 | (struct scsi_cmnd *) hostdata->selecting; | |
882 | hostdata->selecting = NULL; | |
883 | ||
884 | /* construct an IDENTIFY message with correct disconnect bit */ | |
885 | ||
9cb78c16 | 886 | hostdata->outgoing_msg[0] = IDENTIFY(0, cmd->device->lun); |
1da177e4 LT |
887 | if (cmd->SCp.phase) |
888 | hostdata->outgoing_msg[0] |= 0x40; | |
889 | ||
890 | if (hostdata->sync_stat[cmd->device->id] == SS_FIRST) { | |
1da177e4 LT |
891 | |
892 | hostdata->sync_stat[cmd->device->id] = SS_WAITING; | |
893 | ||
894 | /* Tack on a 2nd message to ask about synchronous transfers. If we've | |
895 | * been asked to do only asynchronous transfers on this device, we | |
896 | * request a fifo depth of 0, which is equivalent to async - should | |
897 | * solve the problems some people have had with GVP's Guru ROM. | |
898 | */ | |
899 | ||
900 | hostdata->outgoing_msg[1] = EXTENDED_MESSAGE; | |
901 | hostdata->outgoing_msg[2] = 3; | |
902 | hostdata->outgoing_msg[3] = EXTENDED_SDTR; | |
903 | if (hostdata->no_sync & (1 << cmd->device->id)) { | |
a5d8421b | 904 | calc_sync_msg(hostdata->default_sx_per, 0, |
905 | 0, hostdata->outgoing_msg + 4); | |
1da177e4 | 906 | } else { |
a5d8421b | 907 | calc_sync_msg(optimum_sx_per(hostdata), |
908 | OPTIMUM_SX_OFF, | |
909 | hostdata->fast, | |
910 | hostdata->outgoing_msg + 4); | |
1da177e4 LT |
911 | } |
912 | hostdata->outgoing_len = 6; | |
a5d8421b | 913 | #ifdef SYNC_DEBUG |
914 | ucp = hostdata->outgoing_msg + 1; | |
915 | printk(" sending SDTR %02x03%02x%02x%02x ", | |
916 | ucp[0], ucp[2], ucp[3], ucp[4]); | |
917 | #endif | |
1da177e4 LT |
918 | } else |
919 | hostdata->outgoing_len = 1; | |
920 | ||
921 | hostdata->state = S_CONNECTED; | |
922 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
923 | break; | |
924 | ||
925 | case CSR_XFER_DONE | PHS_DATA_IN: | |
926 | case CSR_UNEXP | PHS_DATA_IN: | |
927 | case CSR_SRV_REQ | PHS_DATA_IN: | |
928 | DB(DB_INTR, | |
929 | printk("IN-%d.%d", cmd->SCp.this_residual, | |
930 | cmd->SCp.buffers_residual)) | |
931 | transfer_bytes(regs, cmd, DATA_IN_DIR); | |
932 | if (hostdata->state != S_RUNNING_LEVEL2) | |
933 | hostdata->state = S_CONNECTED; | |
934 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
935 | break; | |
936 | ||
937 | case CSR_XFER_DONE | PHS_DATA_OUT: | |
938 | case CSR_UNEXP | PHS_DATA_OUT: | |
939 | case CSR_SRV_REQ | PHS_DATA_OUT: | |
940 | DB(DB_INTR, | |
941 | printk("OUT-%d.%d", cmd->SCp.this_residual, | |
942 | cmd->SCp.buffers_residual)) | |
943 | transfer_bytes(regs, cmd, DATA_OUT_DIR); | |
944 | if (hostdata->state != S_RUNNING_LEVEL2) | |
945 | hostdata->state = S_CONNECTED; | |
946 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
947 | break; | |
948 | ||
949 | /* Note: this interrupt should not occur in a LEVEL2 command */ | |
950 | ||
951 | case CSR_XFER_DONE | PHS_COMMAND: | |
952 | case CSR_UNEXP | PHS_COMMAND: | |
953 | case CSR_SRV_REQ | PHS_COMMAND: | |
5cd049a5 | 954 | DB(DB_INTR, printk("CMND-%02x", cmd->cmnd[0])) |
1da177e4 LT |
955 | transfer_pio(regs, cmd->cmnd, cmd->cmd_len, DATA_OUT_DIR, |
956 | hostdata); | |
957 | hostdata->state = S_CONNECTED; | |
958 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
959 | break; | |
960 | ||
961 | case CSR_XFER_DONE | PHS_STATUS: | |
962 | case CSR_UNEXP | PHS_STATUS: | |
963 | case CSR_SRV_REQ | PHS_STATUS: | |
964 | DB(DB_INTR, printk("STATUS=")) | |
965 | cmd->SCp.Status = read_1_byte(regs); | |
966 | DB(DB_INTR, printk("%02x", cmd->SCp.Status)) | |
967 | if (hostdata->level2 >= L2_BASIC) { | |
968 | sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear interrupt */ | |
882905c7 | 969 | udelay(7); |
1da177e4 LT |
970 | hostdata->state = S_RUNNING_LEVEL2; |
971 | write_wd33c93(regs, WD_COMMAND_PHASE, 0x50); | |
972 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); | |
973 | } else { | |
974 | hostdata->state = S_CONNECTED; | |
975 | } | |
976 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
977 | break; | |
978 | ||
979 | case CSR_XFER_DONE | PHS_MESS_IN: | |
980 | case CSR_UNEXP | PHS_MESS_IN: | |
981 | case CSR_SRV_REQ | PHS_MESS_IN: | |
982 | DB(DB_INTR, printk("MSG_IN=")) | |
983 | ||
984 | msg = read_1_byte(regs); | |
985 | sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear interrupt */ | |
882905c7 | 986 | udelay(7); |
1da177e4 LT |
987 | |
988 | hostdata->incoming_msg[hostdata->incoming_ptr] = msg; | |
989 | if (hostdata->incoming_msg[0] == EXTENDED_MESSAGE) | |
990 | msg = EXTENDED_MESSAGE; | |
991 | else | |
992 | hostdata->incoming_ptr = 0; | |
993 | ||
994 | cmd->SCp.Message = msg; | |
995 | switch (msg) { | |
996 | ||
997 | case COMMAND_COMPLETE: | |
5cd049a5 | 998 | DB(DB_INTR, printk("CCMP")) |
1da177e4 LT |
999 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
1000 | hostdata->state = S_PRE_CMP_DISC; | |
1001 | break; | |
1002 | ||
1003 | case SAVE_POINTERS: | |
1004 | DB(DB_INTR, printk("SDP")) | |
1005 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); | |
1006 | hostdata->state = S_CONNECTED; | |
1007 | break; | |
1008 | ||
1009 | case RESTORE_POINTERS: | |
1010 | DB(DB_INTR, printk("RDP")) | |
1011 | if (hostdata->level2 >= L2_BASIC) { | |
1012 | write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); | |
1013 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); | |
1014 | hostdata->state = S_RUNNING_LEVEL2; | |
1015 | } else { | |
1016 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); | |
1017 | hostdata->state = S_CONNECTED; | |
1018 | } | |
1019 | break; | |
1020 | ||
1021 | case DISCONNECT: | |
1022 | DB(DB_INTR, printk("DIS")) | |
1023 | cmd->device->disconnect = 1; | |
1024 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); | |
1025 | hostdata->state = S_PRE_TMP_DISC; | |
1026 | break; | |
1027 | ||
1028 | case MESSAGE_REJECT: | |
1029 | DB(DB_INTR, printk("REJ")) | |
1030 | #ifdef SYNC_DEBUG | |
1031 | printk("-REJ-"); | |
1032 | #endif | |
a5d8421b | 1033 | if (hostdata->sync_stat[cmd->device->id] == SS_WAITING) { |
1da177e4 | 1034 | hostdata->sync_stat[cmd->device->id] = SS_SET; |
a5d8421b | 1035 | /* we want default_sx_per, not DEFAULT_SX_PER */ |
1036 | hostdata->sync_xfer[cmd->device->id] = | |
1037 | calc_sync_xfer(hostdata->default_sx_per | |
1038 | / 4, 0, 0, hostdata->sx_table); | |
1039 | } | |
1da177e4 LT |
1040 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); |
1041 | hostdata->state = S_CONNECTED; | |
1042 | break; | |
1043 | ||
1044 | case EXTENDED_MESSAGE: | |
1045 | DB(DB_INTR, printk("EXT")) | |
1046 | ||
1047 | ucp = hostdata->incoming_msg; | |
1048 | ||
1049 | #ifdef SYNC_DEBUG | |
1050 | printk("%02x", ucp[hostdata->incoming_ptr]); | |
1051 | #endif | |
1052 | /* Is this the last byte of the extended message? */ | |
1053 | ||
1054 | if ((hostdata->incoming_ptr >= 2) && | |
1055 | (hostdata->incoming_ptr == (ucp[1] + 1))) { | |
1056 | ||
1057 | switch (ucp[2]) { /* what's the EXTENDED code? */ | |
1058 | case EXTENDED_SDTR: | |
a5d8421b | 1059 | /* default to default async period */ |
1060 | id = calc_sync_xfer(hostdata-> | |
1061 | default_sx_per / 4, 0, | |
1062 | 0, hostdata->sx_table); | |
1da177e4 LT |
1063 | if (hostdata->sync_stat[cmd->device->id] != |
1064 | SS_WAITING) { | |
1065 | ||
1066 | /* A device has sent an unsolicited SDTR message; rather than go | |
1067 | * through the effort of decoding it and then figuring out what | |
1068 | * our reply should be, we're just gonna say that we have a | |
1069 | * synchronous fifo depth of 0. This will result in asynchronous | |
1070 | * transfers - not ideal but so much easier. | |
1071 | * Actually, this is OK because it assures us that if we don't | |
1072 | * specifically ask for sync transfers, we won't do any. | |
1073 | */ | |
1074 | ||
1075 | write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ | |
1076 | hostdata->outgoing_msg[0] = | |
1077 | EXTENDED_MESSAGE; | |
1078 | hostdata->outgoing_msg[1] = 3; | |
1079 | hostdata->outgoing_msg[2] = | |
1080 | EXTENDED_SDTR; | |
a5d8421b | 1081 | calc_sync_msg(hostdata-> |
1082 | default_sx_per, 0, | |
1083 | 0, hostdata->outgoing_msg + 3); | |
1da177e4 | 1084 | hostdata->outgoing_len = 5; |
1da177e4 | 1085 | } else { |
a5d8421b | 1086 | if (ucp[4]) /* well, sync transfer */ |
1087 | id = calc_sync_xfer(ucp[3], ucp[4], | |
1088 | hostdata->fast, | |
1089 | hostdata->sx_table); | |
1090 | else if (ucp[3]) /* very unlikely... */ | |
1091 | id = calc_sync_xfer(ucp[3], ucp[4], | |
1092 | 0, hostdata->sx_table); | |
1da177e4 | 1093 | } |
a5d8421b | 1094 | hostdata->sync_xfer[cmd->device->id] = id; |
1da177e4 | 1095 | #ifdef SYNC_DEBUG |
a5d8421b | 1096 | printk(" sync_xfer=%02x\n", |
1da177e4 LT |
1097 | hostdata->sync_xfer[cmd->device->id]); |
1098 | #endif | |
1099 | hostdata->sync_stat[cmd->device->id] = | |
1100 | SS_SET; | |
1101 | write_wd33c93_cmd(regs, | |
1102 | WD_CMD_NEGATE_ACK); | |
1103 | hostdata->state = S_CONNECTED; | |
1104 | break; | |
1105 | case EXTENDED_WDTR: | |
1106 | write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ | |
1107 | printk("sending WDTR "); | |
1108 | hostdata->outgoing_msg[0] = | |
1109 | EXTENDED_MESSAGE; | |
1110 | hostdata->outgoing_msg[1] = 2; | |
1111 | hostdata->outgoing_msg[2] = | |
1112 | EXTENDED_WDTR; | |
1113 | hostdata->outgoing_msg[3] = 0; /* 8 bit transfer width */ | |
1114 | hostdata->outgoing_len = 4; | |
1115 | write_wd33c93_cmd(regs, | |
1116 | WD_CMD_NEGATE_ACK); | |
1117 | hostdata->state = S_CONNECTED; | |
1118 | break; | |
1119 | default: | |
1120 | write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ | |
1121 | printk | |
1122 | ("Rejecting Unknown Extended Message(%02x). ", | |
1123 | ucp[2]); | |
1124 | hostdata->outgoing_msg[0] = | |
1125 | MESSAGE_REJECT; | |
1126 | hostdata->outgoing_len = 1; | |
1127 | write_wd33c93_cmd(regs, | |
1128 | WD_CMD_NEGATE_ACK); | |
1129 | hostdata->state = S_CONNECTED; | |
1130 | break; | |
1131 | } | |
1132 | hostdata->incoming_ptr = 0; | |
1133 | } | |
1134 | ||
1135 | /* We need to read more MESS_IN bytes for the extended message */ | |
1136 | ||
1137 | else { | |
1138 | hostdata->incoming_ptr++; | |
1139 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); | |
1140 | hostdata->state = S_CONNECTED; | |
1141 | } | |
1142 | break; | |
1143 | ||
1144 | default: | |
1145 | printk("Rejecting Unknown Message(%02x) ", msg); | |
1146 | write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */ | |
1147 | hostdata->outgoing_msg[0] = MESSAGE_REJECT; | |
1148 | hostdata->outgoing_len = 1; | |
1149 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); | |
1150 | hostdata->state = S_CONNECTED; | |
1151 | } | |
1152 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
1153 | break; | |
1154 | ||
1155 | /* Note: this interrupt will occur only after a LEVEL2 command */ | |
1156 | ||
1157 | case CSR_SEL_XFER_DONE: | |
1158 | ||
1159 | /* Make sure that reselection is enabled at this point - it may | |
1160 | * have been turned off for the command that just completed. | |
1161 | */ | |
1162 | ||
1163 | write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER); | |
1164 | if (phs == 0x60) { | |
5cd049a5 | 1165 | DB(DB_INTR, printk("SX-DONE")) |
1da177e4 LT |
1166 | cmd->SCp.Message = COMMAND_COMPLETE; |
1167 | lun = read_wd33c93(regs, WD_TARGET_LUN); | |
1168 | DB(DB_INTR, printk(":%d.%d", cmd->SCp.Status, lun)) | |
1169 | hostdata->connected = NULL; | |
9cb78c16 | 1170 | hostdata->busy[cmd->device->id] &= ~(1 << (cmd->device->lun & 0xff)); |
1da177e4 LT |
1171 | hostdata->state = S_UNCONNECTED; |
1172 | if (cmd->SCp.Status == ILLEGAL_STATUS_BYTE) | |
1173 | cmd->SCp.Status = lun; | |
1174 | if (cmd->cmnd[0] == REQUEST_SENSE | |
6e39836e HR |
1175 | && cmd->SCp.Status != SAM_STAT_GOOD) { |
1176 | set_host_byte(cmd, DID_ERROR); | |
1177 | } else { | |
1178 | set_host_byte(cmd, DID_OK); | |
1179 | scsi_msg_to_host_byte(cmd, cmd->SCp.Message); | |
1180 | set_status_byte(cmd, cmd->SCp.Status); | |
1181 | } | |
9c4f6be7 | 1182 | scsi_done(cmd); |
1da177e4 LT |
1183 | |
1184 | /* We are no longer connected to a target - check to see if | |
1185 | * there are commands waiting to be executed. | |
1186 | */ | |
1187 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
1188 | wd33c93_execute(instance); | |
1189 | } else { | |
1190 | printk | |
5cd049a5 CH |
1191 | ("%02x:%02x:%02x: Unknown SEL_XFER_DONE phase!!---", |
1192 | asr, sr, phs); | |
1da177e4 LT |
1193 | spin_unlock_irqrestore(&hostdata->lock, flags); |
1194 | } | |
1195 | break; | |
1196 | ||
1197 | /* Note: this interrupt will occur only after a LEVEL2 command */ | |
1198 | ||
1199 | case CSR_SDP: | |
1200 | DB(DB_INTR, printk("SDP")) | |
1201 | hostdata->state = S_RUNNING_LEVEL2; | |
1202 | write_wd33c93(regs, WD_COMMAND_PHASE, 0x41); | |
1203 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); | |
1204 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
1205 | break; | |
1206 | ||
1207 | case CSR_XFER_DONE | PHS_MESS_OUT: | |
1208 | case CSR_UNEXP | PHS_MESS_OUT: | |
1209 | case CSR_SRV_REQ | PHS_MESS_OUT: | |
1210 | DB(DB_INTR, printk("MSG_OUT=")) | |
1211 | ||
1212 | /* To get here, we've probably requested MESSAGE_OUT and have | |
1213 | * already put the correct bytes in outgoing_msg[] and filled | |
1214 | * in outgoing_len. We simply send them out to the SCSI bus. | |
1215 | * Sometimes we get MESSAGE_OUT phase when we're not expecting | |
1216 | * it - like when our SDTR message is rejected by a target. Some | |
1217 | * targets send the REJECT before receiving all of the extended | |
1218 | * message, and then seem to go back to MESSAGE_OUT for a byte | |
1219 | * or two. Not sure why, or if I'm doing something wrong to | |
1220 | * cause this to happen. Regardless, it seems that sending | |
1221 | * NOP messages in these situations results in no harm and | |
1222 | * makes everyone happy. | |
1223 | */ | |
1224 | if (hostdata->outgoing_len == 0) { | |
1225 | hostdata->outgoing_len = 1; | |
1226 | hostdata->outgoing_msg[0] = NOP; | |
1227 | } | |
1228 | transfer_pio(regs, hostdata->outgoing_msg, | |
1229 | hostdata->outgoing_len, DATA_OUT_DIR, hostdata); | |
1230 | DB(DB_INTR, printk("%02x", hostdata->outgoing_msg[0])) | |
1231 | hostdata->outgoing_len = 0; | |
1232 | hostdata->state = S_CONNECTED; | |
1233 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
1234 | break; | |
1235 | ||
1236 | case CSR_UNEXP_DISC: | |
1237 | ||
1238 | /* I think I've seen this after a request-sense that was in response | |
1239 | * to an error condition, but not sure. We certainly need to do | |
1240 | * something when we get this interrupt - the question is 'what?'. | |
1241 | * Let's think positively, and assume some command has finished | |
1242 | * in a legal manner (like a command that provokes a request-sense), | |
1243 | * so we treat it as a normal command-complete-disconnect. | |
1244 | */ | |
1245 | ||
1246 | /* Make sure that reselection is enabled at this point - it may | |
1247 | * have been turned off for the command that just completed. | |
1248 | */ | |
1249 | ||
1250 | write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER); | |
1251 | if (cmd == NULL) { | |
1252 | printk(" - Already disconnected! "); | |
1253 | hostdata->state = S_UNCONNECTED; | |
1254 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
1255 | return; | |
1256 | } | |
5cd049a5 | 1257 | DB(DB_INTR, printk("UNEXP_DISC")) |
1da177e4 | 1258 | hostdata->connected = NULL; |
9cb78c16 | 1259 | hostdata->busy[cmd->device->id] &= ~(1 << (cmd->device->lun & 0xff)); |
1da177e4 | 1260 | hostdata->state = S_UNCONNECTED; |
6e39836e HR |
1261 | if (cmd->cmnd[0] == REQUEST_SENSE && |
1262 | cmd->SCp.Status != SAM_STAT_GOOD) { | |
1263 | set_host_byte(cmd, DID_ERROR); | |
1264 | } else { | |
1265 | set_host_byte(cmd, DID_OK); | |
1266 | scsi_msg_to_host_byte(cmd, cmd->SCp.Message); | |
1267 | set_status_byte(cmd, cmd->SCp.Status); | |
1268 | } | |
9c4f6be7 | 1269 | scsi_done(cmd); |
1da177e4 LT |
1270 | |
1271 | /* We are no longer connected to a target - check to see if | |
1272 | * there are commands waiting to be executed. | |
1273 | */ | |
1274 | /* look above for comments on scsi_done() */ | |
1275 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
1276 | wd33c93_execute(instance); | |
1277 | break; | |
1278 | ||
1279 | case CSR_DISC: | |
1280 | ||
1281 | /* Make sure that reselection is enabled at this point - it may | |
1282 | * have been turned off for the command that just completed. | |
1283 | */ | |
1284 | ||
1285 | write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER); | |
5cd049a5 | 1286 | DB(DB_INTR, printk("DISC")) |
1da177e4 LT |
1287 | if (cmd == NULL) { |
1288 | printk(" - Already disconnected! "); | |
1289 | hostdata->state = S_UNCONNECTED; | |
1290 | } | |
1291 | switch (hostdata->state) { | |
1292 | case S_PRE_CMP_DISC: | |
1293 | hostdata->connected = NULL; | |
9cb78c16 | 1294 | hostdata->busy[cmd->device->id] &= ~(1 << (cmd->device->lun & 0xff)); |
1da177e4 LT |
1295 | hostdata->state = S_UNCONNECTED; |
1296 | DB(DB_INTR, printk(":%d", cmd->SCp.Status)) | |
6e39836e HR |
1297 | if (cmd->cmnd[0] == REQUEST_SENSE |
1298 | && cmd->SCp.Status != SAM_STAT_GOOD) { | |
1299 | set_host_byte(cmd, DID_ERROR); | |
1300 | } else { | |
1301 | set_host_byte(cmd, DID_OK); | |
1302 | scsi_msg_to_host_byte(cmd, cmd->SCp.Message); | |
1303 | set_status_byte(cmd, cmd->SCp.Status); | |
1304 | } | |
9c4f6be7 | 1305 | scsi_done(cmd); |
1da177e4 LT |
1306 | break; |
1307 | case S_PRE_TMP_DISC: | |
1308 | case S_RUNNING_LEVEL2: | |
1309 | cmd->host_scribble = (uchar *) hostdata->disconnected_Q; | |
1310 | hostdata->disconnected_Q = cmd; | |
1311 | hostdata->connected = NULL; | |
1312 | hostdata->state = S_UNCONNECTED; | |
1313 | ||
1314 | #ifdef PROC_STATISTICS | |
1315 | hostdata->disc_done_cnt[cmd->device->id]++; | |
1316 | #endif | |
1317 | ||
1318 | break; | |
1319 | default: | |
1320 | printk("*** Unexpected DISCONNECT interrupt! ***"); | |
1321 | hostdata->state = S_UNCONNECTED; | |
1322 | } | |
1323 | ||
1324 | /* We are no longer connected to a target - check to see if | |
1325 | * there are commands waiting to be executed. | |
1326 | */ | |
1327 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
1328 | wd33c93_execute(instance); | |
1329 | break; | |
1330 | ||
1331 | case CSR_RESEL_AM: | |
1332 | case CSR_RESEL: | |
1333 | DB(DB_INTR, printk("RESEL%s", sr == CSR_RESEL_AM ? "_AM" : "")) | |
1334 | ||
1335 | /* Old chips (pre -A ???) don't have advanced features and will | |
1336 | * generate CSR_RESEL. In that case we have to extract the LUN the | |
1337 | * hard way (see below). | |
1338 | * First we have to make sure this reselection didn't | |
1339 | * happen during Arbitration/Selection of some other device. | |
1340 | * If yes, put losing command back on top of input_Q. | |
1341 | */ | |
1342 | if (hostdata->level2 <= L2_NONE) { | |
1343 | ||
1344 | if (hostdata->selecting) { | |
1345 | cmd = (struct scsi_cmnd *) hostdata->selecting; | |
1346 | hostdata->selecting = NULL; | |
9cb78c16 | 1347 | hostdata->busy[cmd->device->id] &= ~(1 << (cmd->device->lun & 0xff)); |
1da177e4 LT |
1348 | cmd->host_scribble = |
1349 | (uchar *) hostdata->input_Q; | |
1350 | hostdata->input_Q = cmd; | |
1351 | } | |
1352 | } | |
1353 | ||
1354 | else { | |
1355 | ||
1356 | if (cmd) { | |
1357 | if (phs == 0x00) { | |
1358 | hostdata->busy[cmd->device->id] &= | |
9cb78c16 | 1359 | ~(1 << (cmd->device->lun & 0xff)); |
1da177e4 LT |
1360 | cmd->host_scribble = |
1361 | (uchar *) hostdata->input_Q; | |
1362 | hostdata->input_Q = cmd; | |
1363 | } else { | |
1364 | printk | |
1365 | ("---%02x:%02x:%02x-TROUBLE: Intrusive ReSelect!---", | |
1366 | asr, sr, phs); | |
1367 | while (1) | |
1368 | printk("\r"); | |
1369 | } | |
1370 | } | |
1371 | ||
1372 | } | |
1373 | ||
1374 | /* OK - find out which device reselected us. */ | |
1375 | ||
1376 | id = read_wd33c93(regs, WD_SOURCE_ID); | |
1377 | id &= SRCID_MASK; | |
1378 | ||
1379 | /* and extract the lun from the ID message. (Note that we don't | |
1380 | * bother to check for a valid message here - I guess this is | |
1381 | * not the right way to go, but...) | |
1382 | */ | |
1383 | ||
1384 | if (sr == CSR_RESEL_AM) { | |
1385 | lun = read_wd33c93(regs, WD_DATA); | |
1386 | if (hostdata->level2 < L2_RESELECT) | |
1387 | write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK); | |
1388 | lun &= 7; | |
1389 | } else { | |
1390 | /* Old chip; wait for msgin phase to pick up the LUN. */ | |
1391 | for (lun = 255; lun; lun--) { | |
1392 | if ((asr = read_aux_stat(regs)) & ASR_INT) | |
1393 | break; | |
1394 | udelay(10); | |
1395 | } | |
1396 | if (!(asr & ASR_INT)) { | |
1397 | printk | |
1398 | ("wd33c93: Reselected without IDENTIFY\n"); | |
1399 | lun = 0; | |
1400 | } else { | |
1401 | /* Verify this is a change to MSG_IN and read the message */ | |
1402 | sr = read_wd33c93(regs, WD_SCSI_STATUS); | |
882905c7 | 1403 | udelay(7); |
1da177e4 LT |
1404 | if (sr == (CSR_ABORT | PHS_MESS_IN) || |
1405 | sr == (CSR_UNEXP | PHS_MESS_IN) || | |
1406 | sr == (CSR_SRV_REQ | PHS_MESS_IN)) { | |
1407 | /* Got MSG_IN, grab target LUN */ | |
1408 | lun = read_1_byte(regs); | |
1409 | /* Now we expect a 'paused with ACK asserted' int.. */ | |
1410 | asr = read_aux_stat(regs); | |
1411 | if (!(asr & ASR_INT)) { | |
1412 | udelay(10); | |
1413 | asr = read_aux_stat(regs); | |
1414 | if (!(asr & ASR_INT)) | |
1415 | printk | |
1416 | ("wd33c93: No int after LUN on RESEL (%02x)\n", | |
1417 | asr); | |
1418 | } | |
1419 | sr = read_wd33c93(regs, WD_SCSI_STATUS); | |
882905c7 | 1420 | udelay(7); |
1da177e4 LT |
1421 | if (sr != CSR_MSGIN) |
1422 | printk | |
1423 | ("wd33c93: Not paused with ACK on RESEL (%02x)\n", | |
1424 | sr); | |
1425 | lun &= 7; | |
1426 | write_wd33c93_cmd(regs, | |
1427 | WD_CMD_NEGATE_ACK); | |
1428 | } else { | |
1429 | printk | |
1430 | ("wd33c93: Not MSG_IN on reselect (%02x)\n", | |
1431 | sr); | |
1432 | lun = 0; | |
1433 | } | |
1434 | } | |
1435 | } | |
1436 | ||
1437 | /* Now we look for the command that's reconnecting. */ | |
1438 | ||
1439 | cmd = (struct scsi_cmnd *) hostdata->disconnected_Q; | |
1440 | patch = NULL; | |
1441 | while (cmd) { | |
9cb78c16 | 1442 | if (id == cmd->device->id && lun == (u8)cmd->device->lun) |
1da177e4 LT |
1443 | break; |
1444 | patch = cmd; | |
1445 | cmd = (struct scsi_cmnd *) cmd->host_scribble; | |
1446 | } | |
1447 | ||
1448 | /* Hmm. Couldn't find a valid command.... What to do? */ | |
1449 | ||
1450 | if (!cmd) { | |
1451 | printk | |
1452 | ("---TROUBLE: target %d.%d not in disconnect queue---", | |
9cb78c16 | 1453 | id, (u8)lun); |
1da177e4 LT |
1454 | spin_unlock_irqrestore(&hostdata->lock, flags); |
1455 | return; | |
1456 | } | |
1457 | ||
1458 | /* Ok, found the command - now start it up again. */ | |
1459 | ||
1460 | if (patch) | |
1461 | patch->host_scribble = cmd->host_scribble; | |
1462 | else | |
1463 | hostdata->disconnected_Q = | |
1464 | (struct scsi_cmnd *) cmd->host_scribble; | |
1465 | hostdata->connected = cmd; | |
1466 | ||
1467 | /* We don't need to worry about 'initialize_SCp()' or 'hostdata->busy[]' | |
1468 | * because these things are preserved over a disconnect. | |
1469 | * But we DO need to fix the DPD bit so it's correct for this command. | |
1470 | */ | |
1471 | ||
1472 | if (cmd->sc_data_direction == DMA_TO_DEVICE) | |
1473 | write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id); | |
1474 | else | |
1475 | write_wd33c93(regs, WD_DESTINATION_ID, | |
1476 | cmd->device->id | DSTID_DPD); | |
1477 | if (hostdata->level2 >= L2_RESELECT) { | |
1478 | write_wd33c93_count(regs, 0); /* we want a DATA_PHASE interrupt */ | |
1479 | write_wd33c93(regs, WD_COMMAND_PHASE, 0x45); | |
1480 | write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER); | |
1481 | hostdata->state = S_RUNNING_LEVEL2; | |
1482 | } else | |
1483 | hostdata->state = S_CONNECTED; | |
1484 | ||
1da177e4 LT |
1485 | spin_unlock_irqrestore(&hostdata->lock, flags); |
1486 | break; | |
1487 | ||
1488 | default: | |
1489 | printk("--UNKNOWN INTERRUPT:%02x:%02x:%02x--", asr, sr, phs); | |
1490 | spin_unlock_irqrestore(&hostdata->lock, flags); | |
1491 | } | |
1492 | ||
1493 | DB(DB_INTR, printk("} ")) | |
1494 | ||
1495 | } | |
1496 | ||
1497 | static void | |
1498 | reset_wd33c93(struct Scsi_Host *instance) | |
1499 | { | |
1500 | struct WD33C93_hostdata *hostdata = | |
1501 | (struct WD33C93_hostdata *) instance->hostdata; | |
1502 | const wd33c93_regs regs = hostdata->regs; | |
1503 | uchar sr; | |
1504 | ||
1505 | #ifdef CONFIG_SGI_IP22 | |
1506 | { | |
1507 | int busycount = 0; | |
1508 | extern void sgiwd93_reset(unsigned long); | |
1509 | /* wait 'til the chip gets some time for us */ | |
1510 | while ((read_aux_stat(regs) & ASR_BSY) && busycount++ < 100) | |
1511 | udelay (10); | |
1512 | /* | |
1513 | * there are scsi devices out there, which manage to lock up | |
1514 | * the wd33c93 in a busy condition. In this state it won't | |
1515 | * accept the reset command. The only way to solve this is to | |
1516 | * give the chip a hardware reset (if possible). The code below | |
1517 | * does this for the SGI Indy, where this is possible | |
1518 | */ | |
1519 | /* still busy ? */ | |
1520 | if (read_aux_stat(regs) & ASR_BSY) | |
1521 | sgiwd93_reset(instance->base); /* yeah, give it the hard one */ | |
1522 | } | |
1523 | #endif | |
1524 | ||
1525 | write_wd33c93(regs, WD_OWN_ID, OWNID_EAF | OWNID_RAF | | |
1526 | instance->this_id | hostdata->clock_freq); | |
1527 | write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); | |
1528 | write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER, | |
1529 | calc_sync_xfer(hostdata->default_sx_per / 4, | |
a5d8421b | 1530 | DEFAULT_SX_OFF, 0, hostdata->sx_table)); |
1da177e4 LT |
1531 | write_wd33c93(regs, WD_COMMAND, WD_CMD_RESET); |
1532 | ||
1533 | ||
1534 | #ifdef CONFIG_MVME147_SCSI | |
1535 | udelay(25); /* The old wd33c93 on MVME147 needs this, at least */ | |
1536 | #endif | |
1537 | ||
1538 | while (!(read_aux_stat(regs) & ASR_INT)) | |
1539 | ; | |
1540 | sr = read_wd33c93(regs, WD_SCSI_STATUS); | |
1541 | ||
1542 | hostdata->microcode = read_wd33c93(regs, WD_CDB_1); | |
1543 | if (sr == 0x00) | |
1544 | hostdata->chip = C_WD33C93; | |
1545 | else if (sr == 0x01) { | |
1546 | write_wd33c93(regs, WD_QUEUE_TAG, 0xa5); /* any random number */ | |
1547 | sr = read_wd33c93(regs, WD_QUEUE_TAG); | |
1548 | if (sr == 0xa5) { | |
1549 | hostdata->chip = C_WD33C93B; | |
1550 | write_wd33c93(regs, WD_QUEUE_TAG, 0); | |
1551 | } else | |
1552 | hostdata->chip = C_WD33C93A; | |
1553 | } else | |
1554 | hostdata->chip = C_UNKNOWN_CHIP; | |
1555 | ||
a5d8421b | 1556 | if (hostdata->chip != C_WD33C93B) /* Fast SCSI unavailable */ |
1557 | hostdata->fast = 0; | |
1558 | ||
1da177e4 LT |
1559 | write_wd33c93(regs, WD_TIMEOUT_PERIOD, TIMEOUT_PERIOD_VALUE); |
1560 | write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED); | |
1561 | } | |
1562 | ||
1563 | int | |
1564 | wd33c93_host_reset(struct scsi_cmnd * SCpnt) | |
1565 | { | |
1566 | struct Scsi_Host *instance; | |
1567 | struct WD33C93_hostdata *hostdata; | |
1568 | int i; | |
1569 | ||
1570 | instance = SCpnt->device->host; | |
ec05e238 | 1571 | spin_lock_irq(instance->host_lock); |
1da177e4 LT |
1572 | hostdata = (struct WD33C93_hostdata *) instance->hostdata; |
1573 | ||
1574 | printk("scsi%d: reset. ", instance->host_no); | |
1575 | disable_irq(instance->irq); | |
1576 | ||
1577 | hostdata->dma_stop(instance, NULL, 0); | |
1578 | for (i = 0; i < 8; i++) { | |
1579 | hostdata->busy[i] = 0; | |
1580 | hostdata->sync_xfer[i] = | |
a5d8421b | 1581 | calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF, |
1582 | 0, hostdata->sx_table); | |
1da177e4 LT |
1583 | hostdata->sync_stat[i] = SS_UNSET; /* using default sync values */ |
1584 | } | |
1585 | hostdata->input_Q = NULL; | |
1586 | hostdata->selecting = NULL; | |
1587 | hostdata->connected = NULL; | |
1588 | hostdata->disconnected_Q = NULL; | |
1589 | hostdata->state = S_UNCONNECTED; | |
1590 | hostdata->dma = D_DMA_OFF; | |
1591 | hostdata->incoming_ptr = 0; | |
1592 | hostdata->outgoing_len = 0; | |
1593 | ||
1594 | reset_wd33c93(instance); | |
1595 | SCpnt->result = DID_RESET << 16; | |
1596 | enable_irq(instance->irq); | |
ec05e238 | 1597 | spin_unlock_irq(instance->host_lock); |
1da177e4 LT |
1598 | return SUCCESS; |
1599 | } | |
1600 | ||
1601 | int | |
1602 | wd33c93_abort(struct scsi_cmnd * cmd) | |
1603 | { | |
1604 | struct Scsi_Host *instance; | |
1605 | struct WD33C93_hostdata *hostdata; | |
1606 | wd33c93_regs regs; | |
1607 | struct scsi_cmnd *tmp, *prev; | |
1608 | ||
1609 | disable_irq(cmd->device->host->irq); | |
1610 | ||
1611 | instance = cmd->device->host; | |
1612 | hostdata = (struct WD33C93_hostdata *) instance->hostdata; | |
1613 | regs = hostdata->regs; | |
1614 | ||
1615 | /* | |
1616 | * Case 1 : If the command hasn't been issued yet, we simply remove it | |
1617 | * from the input_Q. | |
1618 | */ | |
1619 | ||
1620 | tmp = (struct scsi_cmnd *) hostdata->input_Q; | |
a5d361fc | 1621 | prev = NULL; |
1da177e4 LT |
1622 | while (tmp) { |
1623 | if (tmp == cmd) { | |
1624 | if (prev) | |
1625 | prev->host_scribble = cmd->host_scribble; | |
1626 | else | |
1627 | hostdata->input_Q = | |
1628 | (struct scsi_cmnd *) cmd->host_scribble; | |
1629 | cmd->host_scribble = NULL; | |
1630 | cmd->result = DID_ABORT << 16; | |
1631 | printk | |
5cd049a5 CH |
1632 | ("scsi%d: Abort - removing command from input_Q. ", |
1633 | instance->host_no); | |
1da177e4 | 1634 | enable_irq(cmd->device->host->irq); |
9c4f6be7 | 1635 | scsi_done(cmd); |
1da177e4 LT |
1636 | return SUCCESS; |
1637 | } | |
1638 | prev = tmp; | |
1639 | tmp = (struct scsi_cmnd *) tmp->host_scribble; | |
1640 | } | |
1641 | ||
1642 | /* | |
1643 | * Case 2 : If the command is connected, we're going to fail the abort | |
1644 | * and let the high level SCSI driver retry at a later time or | |
1645 | * issue a reset. | |
1646 | * | |
1647 | * Timeouts, and therefore aborted commands, will be highly unlikely | |
1648 | * and handling them cleanly in this situation would make the common | |
1649 | * case of noresets less efficient, and would pollute our code. So, | |
1650 | * we fail. | |
1651 | */ | |
1652 | ||
1653 | if (hostdata->connected == cmd) { | |
1654 | uchar sr, asr; | |
1655 | unsigned long timeout; | |
1656 | ||
5cd049a5 CH |
1657 | printk("scsi%d: Aborting connected command - ", |
1658 | instance->host_no); | |
1da177e4 LT |
1659 | |
1660 | printk("stopping DMA - "); | |
1661 | if (hostdata->dma == D_DMA_RUNNING) { | |
1662 | hostdata->dma_stop(instance, cmd, 0); | |
1663 | hostdata->dma = D_DMA_OFF; | |
1664 | } | |
1665 | ||
1666 | printk("sending wd33c93 ABORT command - "); | |
1667 | write_wd33c93(regs, WD_CONTROL, | |
1668 | CTRL_IDI | CTRL_EDI | CTRL_POLLED); | |
1669 | write_wd33c93_cmd(regs, WD_CMD_ABORT); | |
1670 | ||
1671 | /* Now we have to attempt to flush out the FIFO... */ | |
1672 | ||
1673 | printk("flushing fifo - "); | |
1674 | timeout = 1000000; | |
1675 | do { | |
1676 | asr = read_aux_stat(regs); | |
1677 | if (asr & ASR_DBR) | |
1678 | read_wd33c93(regs, WD_DATA); | |
1679 | } while (!(asr & ASR_INT) && timeout-- > 0); | |
1680 | sr = read_wd33c93(regs, WD_SCSI_STATUS); | |
1681 | printk | |
1682 | ("asr=%02x, sr=%02x, %ld bytes un-transferred (timeout=%ld) - ", | |
1683 | asr, sr, read_wd33c93_count(regs), timeout); | |
1684 | ||
1685 | /* | |
1686 | * Abort command processed. | |
1687 | * Still connected. | |
1688 | * We must disconnect. | |
1689 | */ | |
1690 | ||
1691 | printk("sending wd33c93 DISCONNECT command - "); | |
1692 | write_wd33c93_cmd(regs, WD_CMD_DISCONNECT); | |
1693 | ||
1694 | timeout = 1000000; | |
1695 | asr = read_aux_stat(regs); | |
1696 | while ((asr & ASR_CIP) && timeout-- > 0) | |
1697 | asr = read_aux_stat(regs); | |
1698 | sr = read_wd33c93(regs, WD_SCSI_STATUS); | |
1699 | printk("asr=%02x, sr=%02x.", asr, sr); | |
1700 | ||
9cb78c16 | 1701 | hostdata->busy[cmd->device->id] &= ~(1 << (cmd->device->lun & 0xff)); |
1da177e4 LT |
1702 | hostdata->connected = NULL; |
1703 | hostdata->state = S_UNCONNECTED; | |
1704 | cmd->result = DID_ABORT << 16; | |
1705 | ||
1706 | /* sti();*/ | |
1707 | wd33c93_execute(instance); | |
1708 | ||
1709 | enable_irq(cmd->device->host->irq); | |
9c4f6be7 | 1710 | scsi_done(cmd); |
1da177e4 LT |
1711 | return SUCCESS; |
1712 | } | |
1713 | ||
1714 | /* | |
1715 | * Case 3: If the command is currently disconnected from the bus, | |
1716 | * we're not going to expend much effort here: Let's just return | |
1717 | * an ABORT_SNOOZE and hope for the best... | |
1718 | */ | |
1719 | ||
1720 | tmp = (struct scsi_cmnd *) hostdata->disconnected_Q; | |
1721 | while (tmp) { | |
1722 | if (tmp == cmd) { | |
1723 | printk | |
5cd049a5 CH |
1724 | ("scsi%d: Abort - command found on disconnected_Q - ", |
1725 | instance->host_no); | |
1da177e4 LT |
1726 | printk("Abort SNOOZE. "); |
1727 | enable_irq(cmd->device->host->irq); | |
1728 | return FAILED; | |
1729 | } | |
1730 | tmp = (struct scsi_cmnd *) tmp->host_scribble; | |
1731 | } | |
1732 | ||
1733 | /* | |
1734 | * Case 4 : If we reached this point, the command was not found in any of | |
1735 | * the queues. | |
1736 | * | |
1737 | * We probably reached this point because of an unlikely race condition | |
1738 | * between the command completing successfully and the abortion code, | |
1739 | * so we won't panic, but we will notify the user in case something really | |
1740 | * broke. | |
1741 | */ | |
1742 | ||
1743 | /* sti();*/ | |
1744 | wd33c93_execute(instance); | |
1745 | ||
1746 | enable_irq(cmd->device->host->irq); | |
1747 | printk("scsi%d: warning : SCSI command probably completed successfully" | |
1748 | " before abortion. ", instance->host_no); | |
1749 | return FAILED; | |
1750 | } | |
1751 | ||
1752 | #define MAX_WD33C93_HOSTS 4 | |
6391a113 | 1753 | #define MAX_SETUP_ARGS ARRAY_SIZE(setup_args) |
1da177e4 LT |
1754 | #define SETUP_BUFFER_SIZE 200 |
1755 | static char setup_buffer[SETUP_BUFFER_SIZE]; | |
1756 | static char setup_used[MAX_SETUP_ARGS]; | |
1757 | static int done_setup = 0; | |
1758 | ||
078dda95 | 1759 | static int |
1da177e4 LT |
1760 | wd33c93_setup(char *str) |
1761 | { | |
1762 | int i; | |
1763 | char *p1, *p2; | |
1764 | ||
1765 | /* The kernel does some processing of the command-line before calling | |
1766 | * this function: If it begins with any decimal or hex number arguments, | |
1767 | * ints[0] = how many numbers found and ints[1] through [n] are the values | |
1768 | * themselves. str points to where the non-numeric arguments (if any) | |
1769 | * start: We do our own parsing of those. We construct synthetic 'nosync' | |
1770 | * keywords out of numeric args (to maintain compatibility with older | |
1771 | * versions) and then add the rest of the arguments. | |
1772 | */ | |
1773 | ||
1774 | p1 = setup_buffer; | |
1775 | *p1 = '\0'; | |
1776 | if (str) | |
1777 | strncpy(p1, str, SETUP_BUFFER_SIZE - strlen(setup_buffer)); | |
1778 | setup_buffer[SETUP_BUFFER_SIZE - 1] = '\0'; | |
1779 | p1 = setup_buffer; | |
1780 | i = 0; | |
1781 | while (*p1 && (i < MAX_SETUP_ARGS)) { | |
1782 | p2 = strchr(p1, ','); | |
1783 | if (p2) { | |
1784 | *p2 = '\0'; | |
1785 | if (p1 != p2) | |
1786 | setup_args[i] = p1; | |
1787 | p1 = p2 + 1; | |
1788 | i++; | |
1789 | } else { | |
1790 | setup_args[i] = p1; | |
1791 | break; | |
1792 | } | |
1793 | } | |
1794 | for (i = 0; i < MAX_SETUP_ARGS; i++) | |
1795 | setup_used[i] = 0; | |
1796 | done_setup = 1; | |
1797 | ||
1798 | return 1; | |
1799 | } | |
1800 | __setup("wd33c93=", wd33c93_setup); | |
1801 | ||
1802 | /* check_setup_args() returns index if key found, 0 if not | |
1803 | */ | |
1804 | static int | |
1805 | check_setup_args(char *key, int *flags, int *val, char *buf) | |
1806 | { | |
1807 | int x; | |
1808 | char *cp; | |
1809 | ||
1810 | for (x = 0; x < MAX_SETUP_ARGS; x++) { | |
1811 | if (setup_used[x]) | |
1812 | continue; | |
1813 | if (!strncmp(setup_args[x], key, strlen(key))) | |
1814 | break; | |
1815 | if (!strncmp(setup_args[x], "next", strlen("next"))) | |
1816 | return 0; | |
1817 | } | |
1818 | if (x == MAX_SETUP_ARGS) | |
1819 | return 0; | |
1820 | setup_used[x] = 1; | |
1821 | cp = setup_args[x] + strlen(key); | |
1822 | *val = -1; | |
1823 | if (*cp != ':') | |
1824 | return ++x; | |
1825 | cp++; | |
1826 | if ((*cp >= '0') && (*cp <= '9')) { | |
1827 | *val = simple_strtoul(cp, NULL, 0); | |
1828 | } | |
1829 | return ++x; | |
1830 | } | |
1831 | ||
a5d8421b | 1832 | /* |
1833 | * Calculate internal data-transfer-clock cycle from input-clock | |
1834 | * frequency (/MHz) and fill 'sx_table'. | |
1835 | * | |
1836 | * The original driver used to rely on a fixed sx_table, containing periods | |
1837 | * for (only) the lower limits of the respective input-clock-frequency ranges | |
25985edc | 1838 | * (8-10/12-15/16-20 MHz). Although it seems, that no problems occurred with |
a5d8421b | 1839 | * this setting so far, it might be desirable to adjust the transfer periods |
1840 | * closer to the really attached, possibly 25% higher, input-clock, since | |
1841 | * - the wd33c93 may really use a significant shorter period, than it has | |
1842 | * negotiated (eg. thrashing the target, which expects 4/8MHz, with 5/10MHz | |
1843 | * instead). | |
1844 | * - the wd33c93 may ask the target for a lower transfer rate, than the target | |
1845 | * is capable of (eg. negotiating for an assumed minimum of 252ns instead of | |
1846 | * possible 200ns, which indeed shows up in tests as an approx. 10% lower | |
1847 | * transfer rate). | |
1848 | */ | |
1849 | static inline unsigned int | |
1850 | round_4(unsigned int x) | |
1851 | { | |
1852 | switch (x & 3) { | |
1853 | case 1: --x; | |
1854 | break; | |
1855 | case 2: ++x; | |
df561f66 | 1856 | fallthrough; |
a5d8421b | 1857 | case 3: ++x; |
1858 | } | |
1859 | return x; | |
1860 | } | |
1861 | ||
1862 | static void | |
1863 | calc_sx_table(unsigned int mhz, struct sx_period sx_table[9]) | |
1864 | { | |
1865 | unsigned int d, i; | |
1866 | if (mhz < 11) | |
1867 | d = 2; /* divisor for 8-10 MHz input-clock */ | |
1868 | else if (mhz < 16) | |
1869 | d = 3; /* divisor for 12-15 MHz input-clock */ | |
1870 | else | |
1871 | d = 4; /* divisor for 16-20 MHz input-clock */ | |
1872 | ||
1873 | d = (100000 * d) / 2 / mhz; /* 100 x DTCC / nanosec */ | |
1874 | ||
1875 | sx_table[0].period_ns = 1; | |
1876 | sx_table[0].reg_value = 0x20; | |
1877 | for (i = 1; i < 8; i++) { | |
1878 | sx_table[i].period_ns = round_4((i+1)*d / 100); | |
1879 | sx_table[i].reg_value = (i+1)*0x10; | |
1880 | } | |
1881 | sx_table[7].reg_value = 0; | |
1882 | sx_table[8].period_ns = 0; | |
1883 | sx_table[8].reg_value = 0; | |
1884 | } | |
1885 | ||
1886 | /* | |
1887 | * check and, maybe, map an init- or "clock:"- argument. | |
1888 | */ | |
1889 | static uchar | |
1890 | set_clk_freq(int freq, int *mhz) | |
1891 | { | |
1892 | int x = freq; | |
1893 | if (WD33C93_FS_8_10 == freq) | |
1894 | freq = 8; | |
1895 | else if (WD33C93_FS_12_15 == freq) | |
1896 | freq = 12; | |
1897 | else if (WD33C93_FS_16_20 == freq) | |
1898 | freq = 16; | |
1899 | else if (freq > 7 && freq < 11) | |
1900 | x = WD33C93_FS_8_10; | |
1901 | else if (freq > 11 && freq < 16) | |
1902 | x = WD33C93_FS_12_15; | |
1903 | else if (freq > 15 && freq < 21) | |
1904 | x = WD33C93_FS_16_20; | |
1905 | else { | |
1906 | /* Hmm, wouldn't it be safer to assume highest freq here? */ | |
1907 | x = WD33C93_FS_8_10; | |
1908 | freq = 8; | |
1909 | } | |
1910 | *mhz = freq; | |
1911 | return x; | |
1912 | } | |
1913 | ||
1914 | /* | |
1915 | * to be used with the resync: fast: ... options | |
1916 | */ | |
1917 | static inline void set_resync ( struct WD33C93_hostdata *hd, int mask ) | |
1918 | { | |
1919 | int i; | |
1920 | for (i = 0; i < 8; i++) | |
1921 | if (mask & (1 << i)) | |
1922 | hd->sync_stat[i] = SS_UNSET; | |
1923 | } | |
1924 | ||
1da177e4 LT |
1925 | void |
1926 | wd33c93_init(struct Scsi_Host *instance, const wd33c93_regs regs, | |
1927 | dma_setup_t setup, dma_stop_t stop, int clock_freq) | |
1928 | { | |
1929 | struct WD33C93_hostdata *hostdata; | |
1930 | int i; | |
1931 | int flags; | |
1932 | int val; | |
1933 | char buf[32]; | |
1934 | ||
1935 | if (!done_setup && setup_strings) | |
1936 | wd33c93_setup(setup_strings); | |
1937 | ||
1938 | hostdata = (struct WD33C93_hostdata *) instance->hostdata; | |
1939 | ||
1940 | hostdata->regs = regs; | |
a5d8421b | 1941 | hostdata->clock_freq = set_clk_freq(clock_freq, &i); |
1942 | calc_sx_table(i, hostdata->sx_table); | |
1da177e4 LT |
1943 | hostdata->dma_setup = setup; |
1944 | hostdata->dma_stop = stop; | |
1945 | hostdata->dma_bounce_buffer = NULL; | |
1946 | hostdata->dma_bounce_len = 0; | |
1947 | for (i = 0; i < 8; i++) { | |
1948 | hostdata->busy[i] = 0; | |
1949 | hostdata->sync_xfer[i] = | |
a5d8421b | 1950 | calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF, |
1951 | 0, hostdata->sx_table); | |
1da177e4 LT |
1952 | hostdata->sync_stat[i] = SS_UNSET; /* using default sync values */ |
1953 | #ifdef PROC_STATISTICS | |
1954 | hostdata->cmd_cnt[i] = 0; | |
1955 | hostdata->disc_allowed_cnt[i] = 0; | |
1956 | hostdata->disc_done_cnt[i] = 0; | |
1957 | #endif | |
1958 | } | |
1959 | hostdata->input_Q = NULL; | |
1960 | hostdata->selecting = NULL; | |
1961 | hostdata->connected = NULL; | |
1962 | hostdata->disconnected_Q = NULL; | |
1963 | hostdata->state = S_UNCONNECTED; | |
1964 | hostdata->dma = D_DMA_OFF; | |
1965 | hostdata->level2 = L2_BASIC; | |
1966 | hostdata->disconnect = DIS_ADAPTIVE; | |
1967 | hostdata->args = DEBUG_DEFAULTS; | |
1968 | hostdata->incoming_ptr = 0; | |
1969 | hostdata->outgoing_len = 0; | |
1970 | hostdata->default_sx_per = DEFAULT_SX_PER; | |
1da177e4 LT |
1971 | hostdata->no_dma = 0; /* default is DMA enabled */ |
1972 | ||
1973 | #ifdef PROC_INTERFACE | |
1974 | hostdata->proc = PR_VERSION | PR_INFO | PR_STATISTICS | | |
1975 | PR_CONNECTED | PR_INPUTQ | PR_DISCQ | PR_STOP; | |
1976 | #ifdef PROC_STATISTICS | |
1977 | hostdata->dma_cnt = 0; | |
1978 | hostdata->pio_cnt = 0; | |
1979 | hostdata->int_cnt = 0; | |
1980 | #endif | |
1981 | #endif | |
1982 | ||
a5d8421b | 1983 | if (check_setup_args("clock", &flags, &val, buf)) { |
1984 | hostdata->clock_freq = set_clk_freq(val, &val); | |
1985 | calc_sx_table(val, hostdata->sx_table); | |
1986 | } | |
1987 | ||
1da177e4 LT |
1988 | if (check_setup_args("nosync", &flags, &val, buf)) |
1989 | hostdata->no_sync = val; | |
1990 | ||
1991 | if (check_setup_args("nodma", &flags, &val, buf)) | |
1992 | hostdata->no_dma = (val == -1) ? 1 : val; | |
1993 | ||
1994 | if (check_setup_args("period", &flags, &val, buf)) | |
1995 | hostdata->default_sx_per = | |
a5d8421b | 1996 | hostdata->sx_table[round_period((unsigned int) val, |
1997 | hostdata->sx_table)].period_ns; | |
1da177e4 LT |
1998 | |
1999 | if (check_setup_args("disconnect", &flags, &val, buf)) { | |
2000 | if ((val >= DIS_NEVER) && (val <= DIS_ALWAYS)) | |
2001 | hostdata->disconnect = val; | |
2002 | else | |
2003 | hostdata->disconnect = DIS_ADAPTIVE; | |
2004 | } | |
2005 | ||
2006 | if (check_setup_args("level2", &flags, &val, buf)) | |
2007 | hostdata->level2 = val; | |
2008 | ||
2009 | if (check_setup_args("debug", &flags, &val, buf)) | |
2010 | hostdata->args = val & DB_MASK; | |
2011 | ||
a5d8421b | 2012 | if (check_setup_args("burst", &flags, &val, buf)) |
2013 | hostdata->dma_mode = val ? CTRL_BURST:CTRL_DMA; | |
2014 | ||
2015 | if (WD33C93_FS_16_20 == hostdata->clock_freq /* divisor 4 */ | |
2016 | && check_setup_args("fast", &flags, &val, buf)) | |
2017 | hostdata->fast = !!val; | |
1da177e4 LT |
2018 | |
2019 | if ((i = check_setup_args("next", &flags, &val, buf))) { | |
2020 | while (i) | |
2021 | setup_used[--i] = 1; | |
2022 | } | |
2023 | #ifdef PROC_INTERFACE | |
2024 | if (check_setup_args("proc", &flags, &val, buf)) | |
2025 | hostdata->proc = val; | |
2026 | #endif | |
2027 | ||
2028 | spin_lock_irq(&hostdata->lock); | |
2029 | reset_wd33c93(instance); | |
2030 | spin_unlock_irq(&hostdata->lock); | |
2031 | ||
2032 | printk("wd33c93-%d: chip=%s/%d no_sync=0x%x no_dma=%d", | |
2033 | instance->host_no, | |
2034 | (hostdata->chip == C_WD33C93) ? "WD33c93" : (hostdata->chip == | |
2035 | C_WD33C93A) ? | |
2036 | "WD33c93A" : (hostdata->chip == | |
2037 | C_WD33C93B) ? "WD33c93B" : "unknown", | |
2038 | hostdata->microcode, hostdata->no_sync, hostdata->no_dma); | |
2039 | #ifdef DEBUGGING_ON | |
2040 | printk(" debug_flags=0x%02x\n", hostdata->args); | |
2041 | #else | |
2042 | printk(" debugging=OFF\n"); | |
2043 | #endif | |
2044 | printk(" setup_args="); | |
2045 | for (i = 0; i < MAX_SETUP_ARGS; i++) | |
2046 | printk("%s,", setup_args[i]); | |
2047 | printk("\n"); | |
565502f8 | 2048 | printk(" Version %s - %s\n", WD33C93_VERSION, WD33C93_DATE); |
1da177e4 LT |
2049 | } |
2050 | ||
408bb25b | 2051 | int wd33c93_write_info(struct Scsi_Host *instance, char *buf, int len) |
1da177e4 | 2052 | { |
1da177e4 | 2053 | #ifdef PROC_INTERFACE |
1da177e4 | 2054 | char *bp; |
1da177e4 | 2055 | struct WD33C93_hostdata *hd; |
a5d8421b | 2056 | int x; |
1da177e4 LT |
2057 | |
2058 | hd = (struct WD33C93_hostdata *) instance->hostdata; | |
2059 | ||
408bb25b | 2060 | /* We accept the following |
a5d8421b | 2061 | * keywords (same format as command-line, but arguments are not optional): |
1da177e4 LT |
2062 | * debug |
2063 | * disconnect | |
2064 | * period | |
2065 | * resync | |
2066 | * proc | |
2067 | * nodma | |
a5d8421b | 2068 | * level2 |
2069 | * burst | |
2070 | * fast | |
2071 | * nosync | |
1da177e4 LT |
2072 | */ |
2073 | ||
408bb25b AV |
2074 | buf[len] = '\0'; |
2075 | for (bp = buf; *bp; ) { | |
2076 | while (',' == *bp || ' ' == *bp) | |
2077 | ++bp; | |
2078 | if (!strncmp(bp, "debug:", 6)) { | |
2079 | hd->args = simple_strtoul(bp+6, &bp, 0) & DB_MASK; | |
2080 | } else if (!strncmp(bp, "disconnect:", 11)) { | |
2081 | x = simple_strtoul(bp+11, &bp, 0); | |
2082 | if (x < DIS_NEVER || x > DIS_ALWAYS) | |
2083 | x = DIS_ADAPTIVE; | |
2084 | hd->disconnect = x; | |
2085 | } else if (!strncmp(bp, "period:", 7)) { | |
2086 | x = simple_strtoul(bp+7, &bp, 0); | |
2087 | hd->default_sx_per = | |
2088 | hd->sx_table[round_period((unsigned int) x, | |
2089 | hd->sx_table)].period_ns; | |
2090 | } else if (!strncmp(bp, "resync:", 7)) { | |
2091 | set_resync(hd, (int)simple_strtoul(bp+7, &bp, 0)); | |
2092 | } else if (!strncmp(bp, "proc:", 5)) { | |
2093 | hd->proc = simple_strtoul(bp+5, &bp, 0); | |
2094 | } else if (!strncmp(bp, "nodma:", 6)) { | |
2095 | hd->no_dma = simple_strtoul(bp+6, &bp, 0); | |
2096 | } else if (!strncmp(bp, "level2:", 7)) { | |
2097 | hd->level2 = simple_strtoul(bp+7, &bp, 0); | |
2098 | } else if (!strncmp(bp, "burst:", 6)) { | |
2099 | hd->dma_mode = | |
2100 | simple_strtol(bp+6, &bp, 0) ? CTRL_BURST:CTRL_DMA; | |
2101 | } else if (!strncmp(bp, "fast:", 5)) { | |
2102 | x = !!simple_strtol(bp+5, &bp, 0); | |
2103 | if (x != hd->fast) | |
2104 | set_resync(hd, 0xff); | |
2105 | hd->fast = x; | |
2106 | } else if (!strncmp(bp, "nosync:", 7)) { | |
a5d8421b | 2107 | x = simple_strtoul(bp+7, &bp, 0); |
408bb25b AV |
2108 | set_resync(hd, x ^ hd->no_sync); |
2109 | hd->no_sync = x; | |
2110 | } else { | |
2111 | break; /* unknown keyword,syntax-error,... */ | |
1da177e4 | 2112 | } |
1da177e4 | 2113 | } |
408bb25b AV |
2114 | return len; |
2115 | #else | |
2116 | return 0; | |
2117 | #endif | |
2118 | } | |
2119 | ||
2120 | int | |
2121 | wd33c93_show_info(struct seq_file *m, struct Scsi_Host *instance) | |
2122 | { | |
2123 | #ifdef PROC_INTERFACE | |
2124 | struct WD33C93_hostdata *hd; | |
2125 | struct scsi_cmnd *cmd; | |
2126 | int x; | |
2127 | ||
2128 | hd = (struct WD33C93_hostdata *) instance->hostdata; | |
1da177e4 LT |
2129 | |
2130 | spin_lock_irq(&hd->lock); | |
408bb25b AV |
2131 | if (hd->proc & PR_VERSION) |
2132 | seq_printf(m, "\nVersion %s - %s.", | |
565502f8 | 2133 | WD33C93_VERSION, WD33C93_DATE); |
408bb25b | 2134 | |
1da177e4 | 2135 | if (hd->proc & PR_INFO) { |
408bb25b | 2136 | seq_printf(m, "\nclock_freq=%02x no_sync=%02x no_dma=%d" |
a5d8421b | 2137 | " dma_mode=%02x fast=%d", |
2138 | hd->clock_freq, hd->no_sync, hd->no_dma, hd->dma_mode, hd->fast); | |
91c40f24 | 2139 | seq_puts(m, "\nsync_xfer[] = "); |
408bb25b AV |
2140 | for (x = 0; x < 7; x++) |
2141 | seq_printf(m, "\t%02x", hd->sync_xfer[x]); | |
91c40f24 | 2142 | seq_puts(m, "\nsync_stat[] = "); |
408bb25b AV |
2143 | for (x = 0; x < 7; x++) |
2144 | seq_printf(m, "\t%02x", hd->sync_stat[x]); | |
1da177e4 LT |
2145 | } |
2146 | #ifdef PROC_STATISTICS | |
2147 | if (hd->proc & PR_STATISTICS) { | |
91c40f24 | 2148 | seq_puts(m, "\ncommands issued: "); |
408bb25b AV |
2149 | for (x = 0; x < 7; x++) |
2150 | seq_printf(m, "\t%ld", hd->cmd_cnt[x]); | |
91c40f24 | 2151 | seq_puts(m, "\ndisconnects allowed:"); |
408bb25b AV |
2152 | for (x = 0; x < 7; x++) |
2153 | seq_printf(m, "\t%ld", hd->disc_allowed_cnt[x]); | |
91c40f24 | 2154 | seq_puts(m, "\ndisconnects done: "); |
408bb25b AV |
2155 | for (x = 0; x < 7; x++) |
2156 | seq_printf(m, "\t%ld", hd->disc_done_cnt[x]); | |
2157 | seq_printf(m, | |
1da177e4 LT |
2158 | "\ninterrupts: %ld, DATA_PHASE ints: %ld DMA, %ld PIO", |
2159 | hd->int_cnt, hd->dma_cnt, hd->pio_cnt); | |
1da177e4 LT |
2160 | } |
2161 | #endif | |
2162 | if (hd->proc & PR_CONNECTED) { | |
91c40f24 | 2163 | seq_puts(m, "\nconnected: "); |
1da177e4 LT |
2164 | if (hd->connected) { |
2165 | cmd = (struct scsi_cmnd *) hd->connected; | |
9cb78c16 | 2166 | seq_printf(m, " %d:%llu(%02x)", |
5cd049a5 | 2167 | cmd->device->id, cmd->device->lun, cmd->cmnd[0]); |
1da177e4 LT |
2168 | } |
2169 | } | |
2170 | if (hd->proc & PR_INPUTQ) { | |
91c40f24 | 2171 | seq_puts(m, "\ninput_Q: "); |
1da177e4 LT |
2172 | cmd = (struct scsi_cmnd *) hd->input_Q; |
2173 | while (cmd) { | |
9cb78c16 | 2174 | seq_printf(m, " %d:%llu(%02x)", |
5cd049a5 | 2175 | cmd->device->id, cmd->device->lun, cmd->cmnd[0]); |
1da177e4 LT |
2176 | cmd = (struct scsi_cmnd *) cmd->host_scribble; |
2177 | } | |
2178 | } | |
2179 | if (hd->proc & PR_DISCQ) { | |
91c40f24 | 2180 | seq_puts(m, "\ndisconnected_Q:"); |
1da177e4 LT |
2181 | cmd = (struct scsi_cmnd *) hd->disconnected_Q; |
2182 | while (cmd) { | |
9cb78c16 | 2183 | seq_printf(m, " %d:%llu(%02x)", |
5cd049a5 | 2184 | cmd->device->id, cmd->device->lun, cmd->cmnd[0]); |
1da177e4 LT |
2185 | cmd = (struct scsi_cmnd *) cmd->host_scribble; |
2186 | } | |
2187 | } | |
f50332ff | 2188 | seq_putc(m, '\n'); |
1da177e4 | 2189 | spin_unlock_irq(&hd->lock); |
1da177e4 | 2190 | #endif /* PROC_INTERFACE */ |
408bb25b | 2191 | return 0; |
1da177e4 LT |
2192 | } |
2193 | ||
1da177e4 LT |
2194 | EXPORT_SYMBOL(wd33c93_host_reset); |
2195 | EXPORT_SYMBOL(wd33c93_init); | |
1da177e4 LT |
2196 | EXPORT_SYMBOL(wd33c93_abort); |
2197 | EXPORT_SYMBOL(wd33c93_queuecommand); | |
2198 | EXPORT_SYMBOL(wd33c93_intr); | |
408bb25b AV |
2199 | EXPORT_SYMBOL(wd33c93_show_info); |
2200 | EXPORT_SYMBOL(wd33c93_write_info); |